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Journal articles on the topic 'Visual acuity'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Dulani, Nisha, Harish Dulani, and Tapan Kumar De. "Comparison of smartphone based peek visual acuity with Snellen Visual Acuity." Journal of Applied Pharmaceutical Research 11, no. 4 (2023): 15–18. http://dx.doi.org/10.18231/j.joapr.2023.11.4.15.18.

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Purpose: To test an alternative method of visual acuity assessment by comparing habitual and best-corrected visual acuity by Snellen and Peek (a visual acuity testing smartphone application). Methods: A prospective study comparing visual acuity using Snellen's and Peek's visual acuity charts (smartphone-based applications). 162 eyes were assessed in this hospital-based setting by a single observer. Patients with gross ocular pathology and visual acuity less than 6/60 were excluded from the study. Results: There was no statistically significant difference between best corrected visual acuity by

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Wu, Guangfeng, Lan Wang, Baozeng Li, Chao Zai, Shanyao Zhao, and Hong Cao. "Effects of Binocular Acuity in Visual Impairment Assessment." International Journal of Sciences Volume 4, no. 2015-10 (2015): 16–21. https://doi.org/10.5281/zenodo.3349027.

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Objective: To study the correlations and differences between best corrected visual acuity in the better eye (hereinafter referred to as monocular acuity in the better eye) and binocular acuity after both eyes were best corrected separately (hereinafter referred to as binocular acuity), the relationship between both monocular acuity in the better eye and binocular acuity and reading acuity as well as reading speed were discussed in order to investigate the effect of binocular acuity in visual impairment and visual disability assessment. Methods: Two thousand a hundred and fifteen subjects rangi

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Kim, Sang-Yeob, Byeong-Yeon Moon, Hyun-Gug Cho, and Dong-Sik Yu. "Visual Acuity Outcomes in Diseases Associated with Reduced Visual Acuity: An Analysis of the National Health Insurance Service Database in Korea." International Journal of Environmental Research and Public Health 19, no. 14 (2022): 8689. http://dx.doi.org/10.3390/ijerph19148689.

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Visual acuity declines with age, and disease-related visual acuity changes vary. We evaluated factors affecting visual acuity and age-related visual acuity in diseases associated with reduced visual acuity such as hypertension, diabetes mellitus (DM), glaucoma, and diabetic retinopathy (DR). The Korean National Health Insurance Service 2015–2016 data were analyzed for age-related visual acuity changes and prevalence of diseases associated with reduced visual acuity. Among 993,062 participants, the prevalence rates of hypertension, DM, glaucoma, and DR were 27.0%, 15.1%, 13.8%, and 2.7%, respec

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Otsuka, Mitsuya, Tatsuya Yunoki, Hironori Ozaki, et al. "Prognostic Factors for Postoperative Visual Acuity in Patients with Rhinogenic Optic Neuropathy." Journal of Ophthalmology 2019 (October 3, 2019): 1–5. http://dx.doi.org/10.1155/2019/3417425.

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Purpose. To examine the prognostic factors related to postoperative visual acuity in patients with rhinogenic optic neuropathy. Study Design. Retrospective observational study. Materials and Methods. We retrospectively studied the medical records for 15 eyes of 15 patients who underwent surgery for the treatment of rhinogenic optic neuropathy between 31 January 2010 and 30 April 2018 at Toyama University Hospital. The patient age, sex, preoperative and postoperative visual acuity, duration from visual deficit to surgery, use of steroids, type of rhinogenic optic neuropathy, and the part of sin

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Miura, Gen, Takayuki Baba, Tomoaki Tatsumi, Hirotaka Yokouchi, and Shuichi Yamamoto. "The Impact of Cataract Surgery on Contrast Visual Acuity and Retinal Sensitivity in Patients with Retinitis Pigmentosa." Journal of Ophthalmology 2021 (November 15, 2021): 1–6. http://dx.doi.org/10.1155/2021/2281834.

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Purpose. To determine the effects of cataract surgery on contrast visual acuity and retinal sensitivity in patients with retinitis pigmentosa. Methods. Retinal sensitivity and contrast visual acuity were determined by microperimetry (MAIA) and contrast sensitivity acuity tester (CAT-CP), respectively, before and after cataract surgery. The significance of the correlations between visual acuity, retinal sensitivity, contrast visual acuity, improvements after surgery, and macular structure before and after cataract surgery was determined. Results. Retinal sensitivity and contrast visual acuity w

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Nandzik, Magdalena, Edward Wylęgała, Adam Wylęgała, Dominika Szkodny, Anna Maria Roszkowska, and Ewa Wróblewska-Czajka. "Visual Acuity Examination Methodology in Keratoconus." Journal of Clinical Medicine 12, no. 24 (2023): 7620. http://dx.doi.org/10.3390/jcm12247620.

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Visual acuity is one of the most important parameters for evaluating the vision of patients with keratoconus. This study reviewed 295 articles related to keratoconus published between 2017 and 2022 in which visual acuity was one of the parameters measured. The methodology of visual acuity testing in studies on keratoconus was thoroughly analyzed. The analysis showed that the most commonly indicated chart for testing visual acuity papers on keratoconus is the Snellen chart. It was shown that in 150 out of 295 articles, the authors do not describe the methodology for testing visual acuity. What

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Prokopiuk, Agata, and Jerzy Mackiewicz. "Extended Depth-of- Focus AcrySof<sup>®</sup> IQ Vivity<sup>®</sup> Intraocular Lens Implant – Our Experience." Ophthalmology, no. 1 (December 30, 2023): 7–10. http://dx.doi.org/10.5114/oku/177961.

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PurposeTo present preliminary results of distance, intermediate and near visual acuity, objective and manifest refraction in two groups of patients: targeted on emmetropia and targeted on small myopia after cataract surgery with an implantation of Extended Depth-of-Focus AcrySof<sup>®</sup> IQ Vivity<sup>®</sup> DFT015 (Alcon Inc., Fort Worth, TX, USA) intraocular lens in three months follow-up.Material and MethodsA total of 18 eyes of 15 patients underwent 2.4 mm coaxial cataract surgery with an implantation of AcrySof<sup>®</sup> IQ Vivity<sup>®</

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Martina Vignolo, Joaquina Cibils Jacobo, Rosana Gerometta, and Miguel Eduardo Cibils. "Agudeza visual en estudiantes universitarios de la Universidad Nacional del Nordeste." Revista de Investigación Científica y Tecnológica 8, no. 2 (2025): 6–14. https://doi.org/10.36003/rev.investig.cient.tecnol.v8n2(2024)1.

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Introduction: Visual acuity or central vision is the ability of the eye to differentiate two points close to each other and separated by a certain angle. According to the World Health Organization (WHO), people considered visually impaired are all those who have a visual acuity value of less than 0.3 (3/10 or 6/18). Objective: To evaluate the visual acuity of a random group of university students. Methodology: Observational, descriptive, and cross-sectional study on the student population of the Universidad Nacional del Nordeste. The sample was random through spontaneous consultation, where a

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Kabeer, Dilshith Azeezul, Binthu Mathavan, Pankaj Kumar, Nafih Cherappurath, and Vinu W. "Vision Management in Adolescents with Visually Impaired: The Effect of Yogic Visual Concentration." Physical rehabilitation and recreational health technologies 9, no. 2 (2024): 61–65. http://dx.doi.org/10.15391/prrht.2024-9(2).03.

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According to World Health Organization (WHO), 314 million individuals worldwide suffer from some degree of vision impairment. Yoga is an effective intervention for the purification and preparation of the body. The leading cleaning practices such as yoga postures, breathing control, and meditation, among others. These techniques include a yogic visual concentration technique known as Trataka. According to certain studies, yogic visual concentration improves eyesight. However, the immediate effect of trataka on visual acuity in adolescents with the visually impaired has not been investigated. Pu

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Arora, Sahil, Abhishek Sachdeva, Tushar Goel, Komal Singh, and Mridu Aggarwal. "To study the correlation of mean macular thickness using optical coherence tomography with distant and near visual acuity in patients of diabetic maculopathy." International Journal of Research in Medical Sciences 6, no. 3 (2018): 863. http://dx.doi.org/10.18203/2320-6012.ijrms20180605.

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Background: to study the correlation of mean macular thickness using optical coherence tomography with distant and near visual acuity in patients of diabetic maculopathy.Methods: A prospective, single centre study was conducted on 50 eyes of diabetic patients, with Diabetic Retinopathy with CSME in which patients macular thickness was measured on Ocular Coherence Tomography using fast macular thickness scan. The unaided and best corrected visual acuity was measured in all patients using Snellens distant vision and Jaggers near vision charts.Results: A linear correlation between the OCT measure

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Wang, Hanbin, Wei Sun, Zhuang Fu, et al. "The Pattern of Visual Impairment in Patients with Pituitary Adenoma." Journal of International Medical Research 36, no. 5 (2008): 1064–69. http://dx.doi.org/10.1177/147323000803600525.

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This retrospective study aimed to identify the pattern of visual impairment in pituitary adenoma patients. Patients' eyes were categorized into four groups according to their visual acuity score. Trans-sphenoidal hypophysectomy was performed on all patients. Significant differences between groups were evaluated for visual field defects, visual symptoms duration, degree of suprasellar extension and tumour pathology. In the 201 patients (402 eyes) evaluated, 166 eyes had impaired visual acuity (45 eyes, < 4.0; 43 eyes, 4.0–4.4; and 78 eyes, 4.5–4.8), 236 eyes scored > 4.8 and were consider

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Mansouri, Asieh, Mohammad Hassan Emamian, Hojjat Zeraati, Hassan Hashemi, and Akbar Fotouhi. "A paradoxical change in economic inequality in presenting visual acuity between 2009 and 2014: a nonuseful decline." Eastern Mediterranean Health Journal 27, no. 07 (2021): 679–86. http://dx.doi.org/10.26719/emhj.21.020.

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Background: Despite the widespread literate on health inequalities and their determinants, changes in health inequalities over time have not received enough attention. Aims: To measure and decompose the over-time changes in economic inequality in presenting visual acuity measured using Logarithm of the Minimum Angle of Resolution. Methods: We analysed 4706 participants who had complete data on presenting visual acuity and economic status in 2009 and 2014 in the Shahroud Eye Cohort Study. We measured changes in presenting visual acuity concentration indices and decomposed them the using a longi

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Wu, Yueh-Hsun, Deyue Yu, Judith E. Goldstein, et al. "Estimating Visual Acuity Without a Visual Acuity Chart." Translational Vision Science & Technology 13, no. 9 (2024): 20. http://dx.doi.org/10.1167/tvst.13.9.20.

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14

Skoczenski, Ann M., and Anthony M. Norcia. "Late Maturation of Visual Hyperacuity." Psychological Science 13, no. 6 (2002): 537–41. http://dx.doi.org/10.1111/1467-9280.00494.

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We used a visual evoked-potential measure to study the development of two components of pattern vision, vernier acuity and grating acuity, in humans from early infancy through adolescence. These two visual functions develop at similar rates and have nearly the same absolute values between 1 month and 6 years of age. After age 6, grating acuity is constant at the adult level, but vernier acuity continues to improve, becoming a hyperacuity. Vernier acuity reaches asymptotic levels around age 14 years. These results suggest that adultlike vernier hyperacuity is not limited by spatial resolution o

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Zheng, Xiaowei, Guanghua Xu, Kai Zhang, et al. "Assessment of Human Visual Acuity Using Visual Evoked Potential: A Review." Sensors 20, no. 19 (2020): 5542. http://dx.doi.org/10.3390/s20195542.

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Visual evoked potential (VEP) has been used as an alternative method to assess visual acuity objectively, especially in non-verbal infants and adults with low intellectual abilities or malingering. By sweeping the spatial frequency of visual stimuli and recording the corresponding VEP, VEP acuity can be defined by analyzing electroencephalography (EEG) signals. This paper presents a review on the VEP-based visual acuity assessment technique, including a brief overview of the technique, the effects of the parameters of visual stimuli, and signal acquisition and analysis of the VEP acuity test,

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Bowden, Frank. "Considerations of Visual Quality in Ocular Surgery as Presented at Dry Eye University." Journal of Dry Eye Disease 3, (SP1) (2020): e28-e29. http://dx.doi.org/10.22374/jded.v3i(sp1).27.

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Visual quality may be described as the visual experience which reflects the optimal optical efficiency of the eye. Patients undergoing ocular surgery expect improvement in visual acuity. Ocular surgeons typically aim to improve best-corrected visual acuity. Refractive surgeons, on the other hand, strive to improve uncorrected visual acuity. It is not uncommon that patients with excellent corrected visual acuity following surgery may be dissatisfied with visual quality which is less than anticipated due to unexpected visual disturbances. These visual phenomena may include ghosting, glare, halos

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Irie-Ota, Akiko, Yoshitsugu Matsui, Koki Imai, et al. "Predicting postoperative visual acuity in epiretinal membrane patients and visualization of the contribution of explanatory variables in a machine learning model." PLOS ONE 19, no. 7 (2024): e0304281. http://dx.doi.org/10.1371/journal.pone.0304281.

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Background The purpose of this study was to develop a model that can predict the postoperative visual acuity in eyes that had undergone vitrectomy for an epiretinal membrane (ERM). The Light Gradient Boosting Machine (LightGBM) was used to evaluate the accuracy of the prediction and the contribution of the explanatory variables. Two models were designed to predict the postoperative visual acuity in 67 ERM patients. Model 1 used the age, sex, affected eye, axial length, preoperative visual acuity, Govetto’s classification stage, and OCT-derived vector information as features to predict the visu

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Indrawati, Raisha Pratiwi, Reni Farenia, and Mayasari Wahyu Kuntorini. "PENGARUH AKTIVITAS MELIHAT DEKAT TERHADAP TAJAM PENGLIHATAN PADA MURID SEKOLAH MENENGAH PERTAMA DI KECAMATAN JATINANGOR." JURNAL ILMU FAAL OLAHRAGA INDONESIA 1, no. 2 (2020): 8. http://dx.doi.org/10.51671/jifo.v1i2.54.

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Near work activity was estimates as risk factor of refractive error. This study aimed to analyze the association between near work activity and visucal acuity in junior high school students in Jatinangor. This study used cross-sectional method. Total of 147 subjects were screened for visual impairment and assessed for near work activities. Result showed total diopter-hours and time spent for each near work activity was less in group with visual acuity ≥ 6/18 than < 6/18 with no significant difference, except for playing games (p=0.018). In conclusion, near work activity does not have impact

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Indrawati, Raisha Pratiwi, Reni Farenia, and Mayasari Wahyu Kuntorini. "PENGARUH AKTIVITAS MELIHAT DEKAT TERHADAP TAJAM PENGLIHATAN PADA MURID SEKOLAH MENENGAH PERTAMA DI KECAMATAN JATINANGOR." JURNAL ILMU FAAL OLAHRAGA INDONESIA 3, no. 1 (2021): 9. http://dx.doi.org/10.51671/jifo.v3i1.89.

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Near work activity was estimates as risk factor of refractive error. This study aimed to analyze the association between near work activity and visucal acuity in junior high school students in Jatinangor. This study used cross-sectional method. Total of 147 subjects were screened for visual impairment and assessed for near work activities. Result showed total diopter-hours and time spent for each near work activity was less in group with visual acuity ≥ 6/18 than < 6/18 with no significant difference, except for playing games (p=0.018). In conclusion, near work activity does not have impact

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Grkovic, Desanka, and Sofija Davidovic. "Prognostic factors for postoperative visual outcome in surgically treated suprasellar meningiomas." Medical review 69, no. 5-6 (2016): 146–52. http://dx.doi.org/10.2298/mpns1606146g.

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Introduction. The prognosis of postoperative visual acuity in patients with surgically treated suprasellar meningiomas is influenced not only by the size and precise localization of meningiomas in the optochiasmatic region and their compressive effect, but also by certain parameters, such as the age of patient, duration of symptoms, and preoperative visual acuity. The purpose of this study was to analyze the influence of these factors on postoperative visual acuity in the patients with surgically treated optochiasmatic meningioma as well as to determine their prognostic value in the recovery o

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Millslagle, Duane G. "Dynamic Visual Acuity and Coincidence-Anticipation Timing by Experienced and Inexperienced Women Players of Fast Pitch Softball." Perceptual and Motor Skills 90, no. 2 (2000): 498–504. http://dx.doi.org/10.2466/pms.2000.90.2.498.

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This study examined the relationship between dynamic visual acuity and coincidence-anticipation timing in 16 inexperienced and 16 experienced women's fast pitch Softball players. Pearson-product correlations indicated a low relationship between dynamic visual acuity and coincidence-anticipation timing. The correlations for dynamic visual acuity and coincidence anticipation between experienced and inexperienced dynamic visual acuity were not significant. A significant difference was found between the mean dynamic visual acuity of the two groups, i.e., experienced players had better dynamic visu

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Kohmura, Yoshimitsu, Shigeki Murakami, and Kazuhiro Aoki. "Effect of Yellow-Tinted Lenses on Visual Attributes Related to Sports Activities." Journal of Human Kinetics 36, no. 1 (2013): 27–36. http://dx.doi.org/10.2478/hukin-2013-0003.

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The purpose of this study was to clarify the effect of colored lenses on visual attributes related to sports activities. The subjects were 24 students (11 females, 13 males; average age 21.0 ±1.2 years) attending a sports university. Lenses of 5 colors were used: colorless, light yellow, dark yellow, light gray, and dark gray. For each lens, measurements were performed in a fixed order: contrast sensitivity, dynamic visual acuity, depth perception, hand-eye coordination and visual acuity and low-contrast visual acuity. The conditions for the measurements of visual acuity and low-contrast visua

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Singh, Gagandeep, K. S. Sidhharthan, Jagadeesh K. Reddy, Vandana Sundaram, and Mithun Thulasidas. "Comparison of visual outcomes in patients implanted with Tecnis Eyhance ICB00 and 1-Piece ZCB00 monofocal intraocular lenses." Indian Journal of Ophthalmology 72, no. 2 (2024): 181–84. http://dx.doi.org/10.4103/ijo.ijo_681_23.

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Purpose: To compare the visual outcomes and monocular defocus curve of a new monofocal Tecnis Eyhance IOL (Tecnis ICB00) with Tecnis 1 single piece (ZCB00). Methods: Eighty patients diagnosed with cataract were divided into two groups: Tecnis ICB00 (n = 40) and ZCB00 (n = 40). The visual outcome was evaluated using the following parameters: uncorrected distance visual acuity (UDVA), uncorrected intermediate visual acuity (UIVA), uncorrected near visual acuity (UNVA), corrected distance visual acuity (CDVA), distance corrected intermediate visual acuity (DCIVA), corrected near visual acuity (CN

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Fagundes, Ruth Batista Bezerra, Pedro Ykaro Fialho Silva, Mirella Telles Salgueiro Barboni, et al. "Visual Acuity Thresholds in Preterm Newborns: An Experimental Study." Children 11, no. 9 (2024): 1049. http://dx.doi.org/10.3390/children11091049.

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Purpose: Visual acuity plays a role in mediating neurological development in infants by enabling the differentiation of shapes and discriminating objects. Given the rapid structural development of the brain in the first days of life, this aspect is particularly significant for preterm infants, who typically experience this developmental phase while hospitalized in the neonatal intensive care unit (NICU). Therefore, this study aimed to assess visual acuity thresholds in preterm infants during hospitalization and to evaluate possible correlations between visual acuity and clinical parameters. Me

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Godson, Chukwuemeka Ajuzie, Martins Onwuka Osah, and Linda Okerulu Adaobi. "Low vision and influencing factors of visual acuity among students." Human Biology Review 12, no. 3 (2023): 187–94. https://doi.org/10.5281/zenodo.8404897.

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Aim: To determine the prevalence of low vision and factors influencing visual acuity among students. Materials & Methods: This descriptive study was carried out within 3months in a tertiary institution in eastern part of Nigeria. A non-probability purposive sampling technique was used to select 120 volunteered subjects which included only students (individuals using corrective lens and had undergone eye surgery were excluded). The visual acuity of the selected subjects was measured using Snellen chart. Data obtained was analyzed using SPSS version 25. Results: Among the 120 selected volunt

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Chen, Earnest P., Michael Mills, Tara Gallagher, et al. "Remote vision testing of central retinal acuity and comparison with clinic-based Snellen acuity testing in patients followed for retinal conditions." DIGITAL HEALTH 9 (January 2023): 205520762311807. http://dx.doi.org/10.1177/20552076231180727.

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Introduction The unmet need for remote monitoring of visual function with home-based, patient-centric technologies became increasingly palpable during the COVID-19 pandemic. Many patients with chronic eye conditions lack access to office-based examinations. Here, we evaluate the efficacy of the Accustat® test, a virtual application for measuring near visual acuity on any portable electronic device via telehealth. Materials and methods Thirty-three adult subjects from the telehealth remote monitoring service of a retina practice performed the Accustat® acuity testing at home. All patients under

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Hu, Yueyang, Qiaoyi Xu, Jikang Shi, et al. "Poor Uncorrected Visual Acuity and Association With Sleep Duration and Screen Time: A Dose–Response Relationship Study." Dose-Response 19, no. 4 (2021): 155932582110421. http://dx.doi.org/10.1177/15593258211042161.

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Background We aimed to investigate the prevalence of poor uncorrected visual acuity and the difference among students with different ages and residential areas in the Northeast of China. The relationships between screen time, nighttime sleep duration, and poor uncorrected visual acuity would be explored. Methods It was a cross-sectional study using multi-stage stratified random sampling method to recruit participants. 2149 students have completed questionnaires and underwent visual acuity examinations. The dose–response curve method was applied to examine the non-linear associations between sl

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Geruschat, D. R. "Using the Acuity Card Procedure to Assess Visual Acuity in Children with Severe and Multiple Impairments." Journal of Visual Impairment & Blindness 86, no. 1 (1992): 25–27. http://dx.doi.org/10.1177/0145482x9208600114.

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This study evaluated the Acuity Card Procedure, an acuity test originally developed for assessing the visual acuity of infants. The study found that, of the 36 children assessed, 42 percent responded; however, after a simple intervention, the response rate increased to 85 percent. These results suggest that the Acuity Card Procedure can be useful in assessing the visual acuity of children with severe visual and multiple impairments.

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Millslagle, Duane, Anna DeLarosby, and Sara VonBank. "Incremental Exercise in Dynamic Visual Acuity." Perceptual and Motor Skills 101, no. 2 (2005): 657–64. http://dx.doi.org/10.2466/pms.101.2.657-664.

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As research is limited the purpose of this study was to investigate dynamic visual acuity while cycling at different exercise loads. Accuracy of dynamic visual acuity scores of 20 college-age participants was analyzed by a repeated-measures analysis of variance which indicated improved dynamic visual acuity during cycling as the intensity of exercise increased. A retention test conducted two days after testing yielded evidence of trainability of dynamic visual acuity. In the discussion findings were compared to other visual functions associated with exercise.

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Jung, Sam Young, and Mi-Ra Park. "Two Cases in Which Arteritic Anterior Ischemic Optic Neuropathy Due to Giant Cell Arteritis Occurred Sequentially in Both Eyes." Annals of Optometry and Contact Lens 21, no. 4 (2022): 173–79. http://dx.doi.org/10.52725/aocl.2022.21.4.173.

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Purpose: To report two cases of arteritic anterior ischemic optic neuropathy (AAION) caused by giant cell arteritis (GCA) that occurred sequentially in both eyes.Case summary: An 86-year-old man presented with decreased visual acuity in the left eye that had commenced 3 days earlier. The left eye visual acuity was hand motion, and there was chalky-white optic disc swelling. AAION was diagnosed based on the myalgia, temporal headache, and temporal artery wall thickening. After steroid treatment, the visual acuity had not improved, while the visual acuity in the right eye was stable. A 94-year-o

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Sanjeev, Bhattarai. "Visual Status among Nepalese Civilian Pilots." Open Access Journal of Ophthalmology 6, no. 1 (2021): 1–5. http://dx.doi.org/10.23880/oajo-16000217.

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Introduction: Vision assessment is a part of medical examination for pilots. Visual acuity and refraction are performed routinely but binocular vision assessment is rarely performed. The aim of this study was to evaluate the visual status of Nepalese civilian pilots, including binocular vision assessment. Methods: It was a descriptive, cross sectional study conducted among Nepalese pilots. Thirty pilots operating domestic flights and twenty operating international flights, from 7 different airline companies participated in this study. A detailed ophthalmic examination of the pilots was perform

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Striem-Amit, Ella, Miriam Guendelman, and Amir Amedi. "‘Visual’ acuity of the congenitally blind using visual-to-auditory sensory substitution." Seeing and Perceiving 25 (2012): 191. http://dx.doi.org/10.1163/187847612x648206.

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Sensory Substitution Devices (SSDs) convey visual information through sounds or touch, thus theoretically enabling a form of visual rehabilitation in the blind. However, for clinical use, these devices must provide fine-detailed visual information which was not shown yet for this or other means of visual restoration. To test the possible functional acuity conveyed by such devices, we used the Snellen acuity test conveyed through a high-resolution visual-to-auditory SSD (The vOICe). We show that congenitally fully blind adults can exceed the World Health Organization (WHO) blindness acuity thre

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Zhang, Guo-Yun, Wen-Jun Wang, Yi-Ming Guo, Jun-Han Wei, and Mei-Xia Ren. "Effectiveness of toric soft contact lenses for vision correction in patients with different degrees of astigmatism: a real-world study." International Journal of Ophthalmology 16, no. 11 (2023): 1845–53. http://dx.doi.org/10.18240/ijo.2023.11.17.

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AIM: To assess the visual correction of patients with different degrees of astigmatism with toric soft contact lenses (TSC). METHODS: It was a real-world study with prospective and single-arm design. A total of 384 patients with astigmatism who came for TSC fitting and alignment from November 2022 to January 2023 were included. According to the difference in astigmatism, patients were divided into groups A (cylinder degree: -0.75 to -0.50 D), B (cylinder degree: -1.75 to -1.00 D) and C (cylinder degree ≤ -2.00 D), and followed up on the day of wear, 1wk, 1 and 3mo, mainly to observe visual acu

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Alyaeva, O. O., O. I. Ryabenko, E. M. Tananakina, and I. S. Yushkova. "Zenlens scleral lenses for visual rehabilitation of patients with irregular cornea: a usage experience." Russian Ophthalmological Journal 11, no. 4 (2018): 68–74. http://dx.doi.org/10.21516/2072-0076-2018-11-4-68-74.

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Scleral lenses improve visual acuity in patients with irregular corneal astigmatism, which is especially important when other methods of correction are ineffective.Purpose: to assess the efficiency of Zenlens scleral lenses in patients with irregular cornea.Material and methods. A total of 120 patients (164 eyes) were examined, including 86 males and 34 females, aged from 13 to 63 years (mean age 35 ± 12 years). The patients were divided into 4 groups. Group 1 consisted of patients with keratoconus, group 2 — postpenetrating keratoplasty, group 3 — keratoconus after cross-linking and/or cornea

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Urlic, Iris, Josip Pavan, Zeljko Verzak, Zoran Karlovic, and Dubravka Negovetic Vranic. "The Best Dentistry Professional Visual Acuity Measured under Simulated Clinical Conditions Provides Keplerian Magnification Loupe: A Cross-Sectional Study." Dentistry Journal 9, no. 6 (2021): 69. http://dx.doi.org/10.3390/dj9060069.

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Visual acuity plays an important role in dentists’ vision in their daily clinical routine. This study aimed to determine dental students’ visual acuity without optical aids and when using magnification devices in simulated clinical conditions. The participants were forty-six students at the School of Dental Medicine with a visual acuity of 1.0 in decimal values or 100% in percentage. The central visual acuity was tested using a miniature Snellen eye chart placed in the molar cavity of a dental phantom, in simulated clinical conditions under five different settings (natural visual acuity, by ap

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Rojas Álvarez, Eduardor, Jorge Jara Murillo, and Francisco Atiencia Amaya. "Clareon Intraocular Lens: Results of Cataract Surgery. Exilaser Cuenca Ophthalmological Center, Ecuador June 2020 – July 2021." Ciencia Latina Revista Científica Multidisciplinar 7, no. 6 (2024): 3996–4013. http://dx.doi.org/10.37811/cl_rcm.v7i6.8972.

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Objective: To analyze visual acuity, refractive cylinder, refractive sphere and complications in cataract surgery by phacoemulsification with Clareon intraocular lens. Methodology: A descriptive-observational, longitudinal study based on the review of medical records of the Exilaser Ophthalmology Clinic of 114 patients who underwent cataract surgery by phacoemulsification with a Clareon intraocular lens was carried out. Descriptive statistical techniques such as frequencies, measured percentages were used on those cases of central tendency and comparative analysis with T Student. Results: The

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Wu, Koulong, Liu Yang, Xugui Sun, Lianping He, and Tianhua Du. "Physical performance is associated with visual acuity in university students: results of a school-based study." Revista da Associação Médica Brasileira 66, no. 3 (2020): 296–99. http://dx.doi.org/10.1590/1806-9282.66.3.296.

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SUMMARY OBJECTIVE The aim of our study is to explore the relationship between physical performance and visual acuity in university students in China. METHODS tests of standing long jump, 50-meter dash and pull-ups sit-ups were conducted. The visual acuity was measured using a logarithm of the minimum angle of resolution (logMAR) chart. Pearson correlation was used to test the correlation of physical performance with visual acuity in university students. RESULTS The number of pull-ups was negatively associated with visual acuity in the left eye for male students, while a negative correlation wa

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Nizamudinova, Liliya M., Vadim S. Stebnev, Sergei D. Stebnev, and Igor V. Malov. "Acrysof IQ Vivity (Alcon) extended depth-of-focus intraocular lens: implantation experience." Aspirantskiy Vestnik Povolzhiya 23, no. 2 (2023): 8–12. http://dx.doi.org/10.55531/2072-2354.2023.23.2.8-12.

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Aim to evaluate the results of the AcrySof IQ Vivity (Alcon) extended-focus intraocular lens implantation in cataract surgery with regard to visual acuity at three distances, independence from glasses, severity of photopic phenomena, and patient satisfaction. Material and methods. 20 patients (20 eyes) with cataract were examined and operated. All patients underwent phacoemulsification with implantation of IOL with extended focus depth AcrySof IQ Vivity, with the following analysis of treatment results. The follow-up period lasted for 6 months. Results. In 6 months after surgery, t

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Sever, Tomurcuk Harbigil, and Iffet Yarimaga. "COMPARISON OF SURGICAL SUCCESS AND VISUAL ACUITY IN EXOTROPIA CASES." Journal of Medical Sciences 33, no. 1 (2025): 21–24. https://doi.org/10.52764/jms.25.33.1.4.

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Objective: Exotropia is a condition in which there is a misalignment of the visual axes and a difference in eye symmetry. This can lead to diplopia (double vision) and a decrease in visual acuity. In some cases, the head may also change position to help the affected eye focus on distant objects. The main concerns for patients with exotropia are visual acuity, the appearance of their eyes, and cosmetic postures. Methods: This study examines the success rates of surgery and changes in visual acuity for 44 patients who underwent exotropia surgery. Results: Of the patients who had recession-resect

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Aliev, Abdul-Gamid, Musa Nurudinov, and M. Alieva. "The evolution of visual acuity test methods." Eye 21, no. 128 (2019): 7–14. http://dx.doi.org/10.33791/2222-4408-2019-4-7-14.

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This review presents a historical analysis of the develop¬ment of visual acuity research methods, examines in detail the principles of construction of optotypes and charts for visual acuity examination as well as describes the advantag¬es and disadvantages of modern eye charts. Such attention to this topic is justified by the fact that visual acuity is the main parameter characterizing the state of the eye. There¬fore, the study of visual acuity remains one of the most im¬portant methods of assessing visual functions. The generally accepted systems for visual acuity examination, despite the si

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Gupta, Akansha, Pradeep Agarwal, Himanshu Sapra, Samir Sutar, and Ritesh Kumar Chaurasiya. "Non-pathologic components are associated with reduced visual acuity in myopes after spectacle correction." Indian Journal of Ophthalmology 71, no. 7 (2023): 2862–65. http://dx.doi.org/10.4103/ijo.ijo_2_23.

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Purpose: To find the association between reduced best-corrected visual acuity and non-pathologic components after optical correction in individuals with low to high myopia. Methods: Myopic children under 16 years of age were reviewed using electronic medical records and the following data were extracted and recorded: participant's age, gender, uncorrected visual acuity (UCVA), manifest refraction, and best corrected visual acuity (BCVA). Spherical equivalent and cylinder were classified into low, moderate, and high categories based on the magnitude range. Similarly, astigmatism was defined int

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Samvedya, Veenish, K. S. Smitha, Kamate Mahesh, and Hattiholi Virupaxi. "Correlation of optic nerve on magnetic resonance imaging with visual acuity in children with cerebral visual impairment." Oman Journal of Ophthalmology 17, no. 3 (2024): 371–75. http://dx.doi.org/10.4103/ojo.ojo_238_23.

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Abstract: AIM: The aim of the study was to correlate the optic nerve dimensions at various locations on magnetic resonance imaging (MRI) with the visual acuity of children with cerebral visual impairment (CVI). MATERIALS AND METHODS: A 1-year cross-sectional study was conducted in a tertiary care hospital involving 60 children aged 1 to 12 years diagnosed with CVI but without ocular pathologies. Visual acuity was evaluated using teller acuity cards (TACs). MRI of the brain and orbit was performed using three-dimensional high-resolution, volumetric heavily T2-weighted sequences to screen for br

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Swenor, Bonnielin K., Jiangxia Wang, Varshini Varadaraj, et al. "Vision Impairment and Cognitive Outcomes in Older Adults: The Health ABC Study." Journals of Gerontology: Series A 74, no. 9 (2018): 1454–60. http://dx.doi.org/10.1093/gerona/gly244.

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Abstract Background An association between visual impairment and cognitive outcomes has been documented, but there is limited research examining this relationship using multiple measures of vision. Methods Participants included non-demented individuals in Year 3 of the Visual impairment was assessed using visual acuity, contrast sensitivity, and stereo acuity. Cognitive function was defined using the digit symbol test and the Modified Mini-Mental State Examination (3MS). Incident cognitive impairment was defined as a 3MS score <80 or a decline >5 points following Year 3. Linear mixed eff

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Fernández-Vega-Cueto, Luis, Carlos Lisa, Aranzazu Poo-López, José F. Alfonso, and David Madrid-Costa. "Three-year follow-up of intrastromal corneal ring segment implantation in central keratoconus with regular astigmatism: ‘Bow-tie’ shape." European Journal of Ophthalmology 30, no. 4 (2019): 643–49. http://dx.doi.org/10.1177/1120672119835397.

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Purpose: To assess the outcomes of implanting Ferrara-type intrastromal corneal ring segments in central ‘bow-tie’-shaped keratoconus over 3 years of follow-up. Methods: A total of 20 eyes with central ‘bow-tie’-shaped keratoconus were evaluated before and after implanting Ferrara-type intrastromal corneal ring segments (AJL Ophthalmic, Spain). LogMAR uncorrected distance visual acuity and best corrected distance visual acuity and residual refractive errors analysed using vector analysis were recorded preoperatively, at 6 months, 1 year, and 3 years postoperatively. Results: The mean uncorrect

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Utami, Dera Tresna, and Fatimah Dyah NA. "Correlation Between Best Corrected Visual Acuity Acquired by Snellen Chart with Potential Visual Acuity of Retinometry in Ametropic Patients." Ophthalmologica Indonesiana 43, no. 1 (2019): 24. http://dx.doi.org/10.35749/journal.v43i1.133.

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   Introduction: Potential vision is determined by assessing macular function. Retinometer is a tool that is often used to assess the potential visual acuity. Refractive error is the most common cause of vision decline. Currently, examination of best visual acuity still uses Snellen chart, but if the result of vision correction with Snellen chart not maximized can cause the emergence of other problems such as amblyopia.  Objective: To analyze correlation between best corrected visual acuity (BCVA) acquired by Snellen chart with potential visual acuity of retinometry in

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Matsuo, Toshihiko, Chie Matsuo, Masami Kayano, Aya Mitsufuji, Chiyori Satou, and Hiroaki Matsuoka. "Photorefraction with Spot Vision Screener versus Visual Acuity Testing as Community-Based Preschool Vision Screening at the Age of 3.5 Years in Japan." International Journal of Environmental Research and Public Health 19, no. 14 (2022): 8655. http://dx.doi.org/10.3390/ijerph19148655.

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Nationwide in Japan, a community-based vision-screening program in 3.5-year-old children is conducted in three steps: questionnaires and home visual acuity testing as the primary screening; visual acuity testing by nurses and pediatricians’ inspection in community health centers as the secondary screening; and examinations by ophthalmologists as the tertiary screening. In this study, we introduced photorefraction with a Spot vision screener in addition to visual acuity testing to answer the clinical question of whether photorefraction could better detect eye diseases and potentially replace vi

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Jonas, J. B., R. M. Rank, W. M. Budde, and G. Sauder. "Factors Influencing Visual Outcome after Penetrating Keratoplasty Combined with Intraocular Lens Implantation." European Journal of Ophthalmology 13, no. 2 (2003): 134–38. http://dx.doi.org/10.1177/112067210301300203.

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Purpose To establish which factors influence visual outcome after penetrating keratoplasty combined with intraocular lens implantation. Methods This retrospective noncomparative clinical interventional case series study included 135 consecutive patients (mean age 70.2 ± 13.6 years) who underwent central penetrating allogenic keratoplasty combined with intraocular lens (IOL) implantation, all operated by the same surgeon. There were 79 triple procedures, 33 keratoplasties combined with an exchange of IOL, and 23 penetrating keratoplasties combined with a secondary implantation of a posterior ch

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Zhang, Zhixin, Gang Xu, Jing Gao, et al. "Effects of E-Learning Environment Use on Visual Function of Elementary and Middle School Students: A Two-Year Assessment—Experience from China." International Journal of Environmental Research and Public Health 17, no. 5 (2020): 1560. http://dx.doi.org/10.3390/ijerph17051560.

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This two-year follow-up assessment was performed on 721 elementary (Grades 2–4) and middle (Grade 1) school students who used, and 62 Grade 4 (Control) students who did not use, E-learning environments from schools in Beijing and Shandong Province, China. Statistical analysis included repeated-measures single-factor and two-factor analyses of variance, and analysis of covariance (ANCOVA). In three assessments over two years, the students’ visual acuity, visual field, depth perception, and horary visual acuity were monitored, along with the related differences and developmental changes and the

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Paovic, Jelena, Predrag Paovic, and Vojislav Sredovic. "Correlation between Ocular Manifestations and Their Complications as Opposed to Visual Acuity and Treatment in Behcet's Disease." Autoimmune Diseases 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/842673.

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The aim of this study was to analyze ocular manifestations, their complications, and treatment in a sample of 40 patients with confirmed Behcet’s disease.Results. Serofibrinous iridocyclitis was the most common form of uveitis (60%). Retinal periphlebitis manifested in 92.5% of cases, and periphlebitis in conjunction with periarteritis was diagnosed in 72.5% of cases. Macular edema was the most frequent complication on the posterior segment (60%) and it correlated with periphlebitis (P=0.45) and periphlebitis associated with periarteritis (P=0.51). Cyclosporine A and corticosteroids were used

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Javaid, Hassaan, Omar Zafar, Seemal Akram, Asfandyar Khan, Sana Abbas, and Aisha Rafique. "EVALUATION OF CHANGES IN VISUAL ACUITY AND CONTRAST SENSITIVITY IN PATIENTS WITH KERATOCONUS AFTER CORNEAL COLLAGEN CROSS-LINKING." PAFMJ 71, no. 5 (2021): 1705–08. http://dx.doi.org/10.51253/pafmj.v71i5.4360.

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Objective: To evaluate changes in visual acuity and contrast sensitivity in patients with keratoconus after corneal collagen cross-linking. Study Design: Quasi-experimental study. Place and Duration of Study: Armed Forces Institute of Ophthalmology, Rawalpindi, Pakistan, from May 2019 to Apr 2020. Methodology: A total of 48 eyes of 30 patients with progressive keratoconus were included in this study. Baseline uncorrected distance visual acuity, corrected distance visual acuity and contrast sensitivity were recorded, following which transepithelial corneal collagen cross-linki

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