Academic literature on the topic 'Best corrected visual acuity (BCVA)'
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Journal articles on the topic "Best corrected visual acuity (BCVA)"
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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 ametropic patients. Methods: This was an observational cross sectional study, enrolled at department of ophthalmology dr. Karidi General Hospital. This study involving 73 myopic eyes of 40 patient. After having their potential vision examined with retinometer, patient undergoing visual acuity assesment with Snellen chart. Statistical analysis using Spearman correlation. 
 Result: In this study we found retinometry scale 0,8 for BCVA 1.0 (56,8%) and 0.32 for BCVA < 1.0 (48,4%) as the most common finding respectively. We found most of mild myopia cases in patients with BCVA 1,0 (52%) and high myopia in patients with BCVA < 1.0 (71%). Statistical analysis shows a moderate strength-positive correlation between potential visual acuity retinometry with best corrected visual acuity acquired by Snellen. Conclusion: BCVA acquired by Snellen shows moderate strength-positive correlation with potential visual acuity retinometry in ametropic patient. Scale 0.63 in retinometry can be used as benchmark for predicting visual acuity after correction reach 1.0. 
 
 
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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 into with-the-rule, against-the-rule, and oblique based on the location of the steepest meridian. Reduced BCVA was defined when the decimal visual acuity was less than 0.66 (equivalent to Snellen's acuity of 6/9 or 20/30). Logistic regression was performed to test the factors associated with reduced visual acuity after optical correction in the absence of myopic pathologic changes. Statistical significance was considered if P < 0.05. Results: Overall 44.9% (N = 242/538) of myopes had reduced best-corrected visual acuity (BCVA) and none of the patients had pathologic myopic lesions. Using logistic regression, we found that high spherical refraction (OR 27.98, 95% CI 14.43–54.25, P < 0.001) and moderate spherical refraction (OR 5.52, 95% CI 2.56–11.91, P < 0.001) were significantly associated with reduced best corrected visual acuity despite any pathological lesions. Additionally, oblique and ATR astigmatism were associated with reduced visual acuity in myopic children with (OR 2.05, 95% CI 0.77–5.42) and (OR 1.59, 95% CI 0.82–3.08). Conclusion: Higher magnitude of refractive error components causes reduced visual acuity in the absence of pathologic changes.
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Benita, Katharina Ratri, Hendrian Dwikoloso Soebagjo, and Siprianus Ugroseno Yudho Bintoro. "THE RELATIONSHIP OF MECHANICAL OCULAR TRAUMA TO THE BEST-CORRECTED VISUAL ACUITY RESULTS IN DR SOETOMO GENERAL HOSPITAL SURABAYA." Majalah Biomorfologi 31, no. 1 (2021): 27. http://dx.doi.org/10.20473/mbiom.v31i1.2021.27-33.
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Background: Ocular trauma is an accident caused by a foreign object that affects the eye tissue. Ocular trauma can cause pain and a decrease in the person’s best-corrected visual acuity. Mechanical ocular traumas can cause morphological and functional eye changes that are serious enough to cause blindness. Blindness is often used to describe a severe visual impairment with the remaining visual function. Objective: To determine and to analyze the relationship between mechanical ocular trauma and the best-corrected visual acuity of Dr. Soetomo General Hospital patients in 2016-2018. Material and Method: This study was an analytic study with a cross-sectional design. The data was collected using the medical records of Dr. Soetomo General Hospital patients in 2016-2018. The population of this study consists of all patients with pure mechanical ocular trauma with a total of 198 subjects. Results: Fisher exact test results showed a value of p=0.054 which means there is no significant relationship between the best-corrected visual acuity with mechanical ocular trauma. Conclusion: The results of this study showed that there is no significant relationship between mechanical ocular trauma and the best-corrected visual acuity (BCVA) based on the medical record of patients with ocular trauma in Dr. Soetomo General Hospital Surabaya in 2016–2018, on the most results with patients who have BCVA 6/24 - 2 meter finger count.
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Vingolo, Enzo Maria, Simona Mascolo, Lorenzo Casillo, and Mattia Calabro. "The Effects of Slow-Release Dexamethasone in the Treatment of Diabetic Macular Edema." Pharmaceutics 17, no. 2 (2025): 174. https://doi.org/10.3390/pharmaceutics17020174.
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Objectives: to evaluate the efficacy of 0.7 mg dexamethasone intravitreal implant in the treatment of patients with diabetic macular edema through mean retinal sensitivity (MRS), best corrected visual acuity (BCVA), central retinal thickness (CRT) and fixation stability. Methods: patients (n = 50) with DME, best corrected visual acuity (BCVA) of 0.1 logMAR, and central retinal thickness (CRT) of ≥300 μm determined by optical coherence tomography were treated with 0.7 mg slow-release dexamethasone, and endpoints were evaluated one and three months after the injection. Results: The best corrected visual acuity, BCVA, whose mean values at baseline were 0.42 logMAR, improved significantly post dexamethasone injection, with mean values of 0.20 logMAR at one month and 0.24 logMAR at three months. The mean central retinal thickness, CRT, was 463 µm at baseline increasing to 297 µm at one month, and 315 µm at three months. Mean retinal sensitivity (MRS) was 12.31 dB at baseline. In line with other parameters, MRS also showed significant improvement at one month after slow-release dexamethasone treatment, with a mean value of 15.35 Db and the improvement was sustained at three months after injection, with a mean value of 14.71 dB. Fixation stability was assessed using the area of the third BCEA ellipse. At baseline, patients had an ellipse area of 53.68 degrees. At one month after injection, patients showed an improvement, with a mean ellipse area of 5.23 degrees, which was maintained at three months, with a mean ellipse area of 4.13 degrees. Conclusions: The dexamethasone implant of 0.7 mg met the efficacy endpoint for improvement in MRS, BCVA, CRT and fixation stability.
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Benita, Katharina Ratri, Hendrian Dwikoloso Soebagjo, and Siprianus Ugroseno Yudho Bintoro. "THE RELATIONSHIP OF MECHANICAL OCULAR TRAUMA AND THE BEST-CORRECTED VISUAL ACUITY RESULTS IN DR. SOETOMO GENERAL ACADEMIC HOSPITAL, SURABAYA, INDONESIA." Majalah Biomorfologi 31, no. 1 (2021): 24. http://dx.doi.org/10.20473/mbiom.v31i1.2021.24-30.
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Background: Ocular trauma is an accident caused by a foreign object that affects the eye tissue. Ocular trauma can cause pain and a decrease in the person’s best-corrected visual acuity. Mechanical ocular traumas can cause morphological and functional eye changes that are serious enough to cause blindness. Blindness is often used to describe a severe visual impairment with the remaining visual function. Objective: To determine and to analyze the relationship between mechanical ocular trauma and the best-corrected visual acuity of the patients of Dr. Soetomo General Academic Hospital, Surabaya, Indonesia in 2016-2018. Material and Method: This study was an analytic study with a cross-sectional design. The data were collected using the medical records of the patients of Dr. Soetomo General Academic Hospital, Surabaya, Indonesia in 2016-2018. The population of this study consists of all patients with pure mechanical ocular trauma with a total of 198 subjects. Results: Fisher exact test results showed a value of p=0.054, showing that there was no significant relationship between the best-corrected visual acuity and mechanical ocular trauma. Conclusion: No significant relationship was present between mechanical ocular trauma and the best-corrected visual acuity (BCVA) based on the medical record of patients with ocular trauma in Dr. Soetomo General Academic Hospital, Surabaya, Indonesia, Surabaya, in 2016–2018. Most of the patients had BCVA 6/24 - 2 meter counting finger.
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Ueda-Consolvo, Tomoko, Mitsuya Otsuka, Yumiko Hayashi, Masaaki Ishida, and Atsushi Hayashi. "Microperimetric Biofeedback Training Improved Visual Acuity after Successful Macular Hole Surgery." Journal of Ophthalmology 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/572942.
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Purpose. To evaluate the efficacy of setting a preferred retinal locus relocation target (PRT) and performing Macular Integrity Assessment (MAIA) biofeedback training in patients showing insufficient recovery of best corrected visual acuity (BCVA) despite successful closure of an idiopathic macular hole (MH).Methods. Retrospective interventional case series. Nine eyes of 9 consecutive patients with the decimal BCVA of less than 0.6 at more than 3 months after successful MH surgery were included. A PRT was chosen based on MAIA microperimetry and the patients underwent MAIA biofeedback training. BCVA, reading speed, fixation stability, and 63% bivariate contour ellipse area (BCEA) were evaluated before and after the training. Statistical analysis was carried out using paired Student’st-test.Results. PRT was chosen on the nasal side of the closed MH fovea in 8 patients. After the MAIA training, BCVA improved in all patients. The mean logMAR value of BCVA significantly improved from 0.33 to 0.12 (p=0.007). Reading speed improved in all patients (p=0.29), fixation stability improved in 5 patients (p=0.70), and 63% BCEA improved in 7 patients (p=0.21), although these improvements were not statistically significant.Conclusion. MAIA biofeedback training improved visual acuity in patients with insufficient recovery of BCVA after successful MH surgery.
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Lee, Geun Woo, Yun Young Kim, Kyung Jun Choi, and Se Woong Kang. "Factors related to changes in visual symptoms after successful photodynamic therapy in central serous chorioretinopathy." PLOS ONE 18, no. 4 (2023): e0284899. http://dx.doi.org/10.1371/journal.pone.0284899.
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To investigate biomarkers related to visual symptom and best corrected visual acuity (BCVA) improvement after photodynamic therapy (PDT) for central serous chorioretinopathy. This retrospective cross-sectional study involved 42 consecutive eyes, from 42 patients who underwent successful PDT, divided into two groups according to improvement in subjective visual complaints: complete (20 eyes) and incomplete recovery (22 eyes). The clinical characteristics of each group, including central foveal thickness (CFT), foveal avascular zone (FAZ) area, and degree of change in signal voiding of the choriocapillaris on optical coherence tomography angiography, were compared. Correlations between best-corrected visual acuity (BCVA) and baseline clinical features were investigated. At baseline, CFT and FAZ areas showed significant differences between the two groups (all p < 0.05). Multiple binary logistic regression analysis revealed that greater CFT predicted complete recovery from visual complaints (p = 0.002). Reduction or disappearance of signal voiding in the choriocapillaris 6 months post-PDT occurred more frequently in the complete recovery group (p < 0.05). FAZ area before PDT correlated with BCVA before and 6 months after PDT and BCVA improvement during the study period (all p < 0.05). CFT and FAZ area before PDT correlated with completeness of visual symptom recovery after PDT. Smaller FAZ area before PDT correlated with better BCVA before and after treatment.
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Michalska-Małecka, Katarzyna, Dorota Śpiewak, and Dorota Luksa. "Three-Month Results of Brolucizumab Intravitreal Therapy in Patients with Wet Age-Related Macular Degeneration." International Journal of Environmental Research and Public Health 18, no. 16 (2021): 8450. http://dx.doi.org/10.3390/ijerph18168450.
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The purpose of the study was to evaluate changes in best corrected visual acuity, central retinal thickness, area and flow in the neovascular membrane and to compare therapeutic outcomes from baseline in patients who received three doses of Beovu (brolucizumab) at three-month follow-up. Material and methods: A prospective observational study conducted at the Prof. K. Gibiński University Clinical Center of the Medical University of Silesia in Katowice. Eight patients with exudative form of age-related macular degeneration (AMD) were observed. Results: The mean best corrected visual acuity (BCVA) outcome increased with each subsequent visit. The mean central retinal thickness (CRT) result also improved (decreased) with each subsequent visit, except for the last measurement. A statistically significant change in neovascular membrane area was observed after the first injection. In further treatment, the membrane area underwent changes that were not statistically significant. A statistically significant change in neovascular membrane flow was demonstrated after the first and second injections. Discussion: Our study confirmed the efficacy of brolucizumab in the treatment of patients with exudative AMD in terms of improvements in best corrected visual acuity (BCVA), central retinal thickness (CRT), neovascular membrane area, and neovascular membrane flow area.
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Wittenborn, John, Aaron Lee, Elizabeth A. Lundeen, et al. "Comparing Telephone Survey Responses to Best-Corrected Visual Acuity to Estimate the Accuracy of Identifying Vision Loss: Validation Study." JMIR Public Health and Surveillance 9 (March 7, 2023): e44552. http://dx.doi.org/10.2196/44552.
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Background Self-reported questions on blindness and vision problems are collected in many national surveys. Recently released surveillance estimates on the prevalence of vision loss used self-reported data to predict variation in the prevalence of objectively measured acuity loss among population groups for whom examination data are not available. However, the validity of self-reported measures to predict prevalence and disparities in visual acuity has not been established. Objective This study aimed to estimate the diagnostic accuracy of self-reported vision loss measures compared to best-corrected visual acuity (BCVA), inform the design and selection of questions for future data collection, and identify the concordance between self-reported vision and measured acuity at the population level to support ongoing surveillance efforts. Methods We calculated accuracy and correlation between self-reported visual function versus BCVA at the individual and population level among patients from the University of Washington ophthalmology or optometry clinics with a prior eye examination, randomly oversampled for visual acuity loss or diagnosed eye diseases. Self-reported visual function was collected via telephone survey. BCVA was determined based on retrospective chart review. Diagnostic accuracy of questions at the person level was measured based on the area under the receiver operator curve (AUC), whereas population-level accuracy was determined based on correlation. Results The survey question, “Are you blind or do you have serious difficulty seeing, even when wearing glasses?” had the highest accuracy for identifying patients with blindness (BCVA ≤20/200; AUC=0.797). The highest accuracy for detecting any vision loss (BCVA <20/40) was achieved by responses of “fair,” “poor,” or “very poor” to the question, “At the present time, would you say your eyesight, with glasses or contact lenses if you wear them, is excellent, good, fair, poor, or very poor” (AUC=0.716). At the population level, the relative relationship between prevalence based on survey questions and BCVA remained stable for most demographic groups, with the only exceptions being groups with small sample sizes, and these differences were generally not significant. Conclusions Although survey questions are not considered to be sufficiently accurate to be used as a diagnostic test at the individual level, we did find relatively high levels of accuracy for some questions. At the population level, we found that the relative prevalence of the 2 most accurate survey questions were highly correlated with the prevalence of measured visual acuity loss among nearly all demographic groups. The results of this study suggest that self-reported vision questions fielded in national surveys are likely to yield an accurate and stable signal of vision loss across different population groups, although the actual measure of prevalence from these questions is not directly analogous to that of BCVA.
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Byon, Ik Soo, Sung Ho Jo, Han Jo Kwon, Kyong Ho Kim, Sung Who Park, and Ji Eun Lee. "Changes in Visual Acuity after Idiopathic Epiretinal Membrane Removal: Good versus Poor Preoperative Visual Acuity." Ophthalmologica 234, no. 3 (2015): 127–34. http://dx.doi.org/10.1159/000437359.
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Purpose: To investigate postoperative visual acuity changes following idiopathic epiretinal membrane (ERM) surgery as well as investigate the relationship between outcome and baseline visual acuity. Methods: The medical records of 159 consecutive eyes were retrospectively reviewed for best corrected visual acuity (BCVA), central subfield macular thickness (CSMT), and the ellipsoid zone (EZ) signal of the photoreceptor layer at baseline and 1, 3, and 6 months after surgery. Patients were divided into two groups: group A, with good vision of 20/50 or better, and group B, with poor visual acuity worse than 20/50. Results: Seventy-nine eyes were included in group A and 80 eyes in group B. Mean baseline BCVA was 0.28 and 0.65 logarithm of the minimum angle of resolution (logMAR), and the mean baseline CSMT was 423.7 and 505.6 μm in group A and group B, respectively. In group A, BCVA worsened to 0.39 logMAR at 1 month (p < 0.001) and gradually improved to 0.25 logMAR at 6 months, which was not different from baseline BCVA. In group B, BCVA and CSMT improved at 1, 3, and 6 months (p < 0.05). The EZ signal improved in group B (p = 0.003) but not in group A. The area under the receiver operating characteristic curve for the improvement in BCVA of ≥2 lines was significant for preoperative BCVA (0.717, 95% confidence interval 0.638-0.797; p < 0.001). The cutoff value was 0.35 on the logMAR scale. Conclusion: After ERM surgery, patients with good vision maintained visual acuity after temporary worsening of vision, and patients with poor vision achieved significant BCVA improvement.
Dissertations / Theses on the topic "Best corrected visual acuity (BCVA)"
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Drake, Ryan Carpenter. "Analysis of best corrected visual acuity following corneal refractive surgery comparing low and standard predicted postoperative keratometry." Thesis, 2018. https://hdl.handle.net/2144/31154.
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BACKGROUND: It is a commonly held view in the ophthalmologic community that eyes with sufficiently low calculated postoperative corneal keratometry, less than 35 diopters, should not undergo corrective refractive laser surgery (CRLS) due to the increased risk of best corrected visual acuity (BCVA) loss. Typical CRLS include Laser In-Situ Keratomileusis (LASIK), Photorefractive Keratectomy (PRK), and Laser-Assisted Sub-Epithelial Keratectomy (LASEK). Evidence for this claim in currently available literature is sparse and inconsistent.
PURPOSE: To further elucidate the relationship between calculated “flat” postoperative corneal keratometry and loss of BCVA. Additionally, to investigate the role of procedure type (LASIK, ASA, or LASEK) and degree of calculated postoperative corneal flatness on visual outcomes following CRLS.
METHODS: 222 eyes (111 candidates and 111 controls) were retrospectively analyzed and matched based on calculated postoperative keratometry compared to control subgroups with calculated postoperative keratometries ≥38 D and further stratified into subgroups 1b (K=38-38.99 D), 2b (K=39-39.99 D), 3b (K=40-40.9 9D), and 4b (K≥41 D). All of the eyes had undergone LASIK, PRK, or LASEK between December 2008 and November 2016 at Boston Eye Group/Boston Laser in Brookline, MA.
RESULTS: Statistical analyses showed no significant differences between candidates and controls in preoperative BCVA (p=0.650) and postoperative BCVA (p=0.081). Subgroup matching showed no significant differences in the amount of tissue ablated in 1a & 1b (p=0.946), 2a & 2b (p=0.694), 3a & 3b (p=0.989), and 4a & 4b (p=0.986). There was also no significant change between preoperative and postoperative BCVA in subgroups 1a (p=0.367), 2a (p=0.297), 3a (p=0.576), 4a (p=0.669), 1b (p=0.458), 2b (p=0.227), 3b (p=0.071), or 4b (p=0.703). 3 of 111 (2.70%) candidate eyes and 1 (0.90%) control eye lost 1+ lines of BCVA following surgery. There was no statistical difference in 1+ lines of BCVA lost between these groups (p=0.313). Similarly, the type of CRLS undergone did not affect the rate of BCVA line loss (p=0.793).
CONCLUSION: Our evidence suggests that in a matched comparison of flat and normal mathematically predicted postoperative keratometries, there was no increase in BCVA lost due to flat keratometry.
Book chapters on the topic "Best corrected visual acuity (BCVA)"
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Quiroz-Reyes, Miguel A., Erick A. Quiroz-Gonzalez, Miguel A. Quiroz-Gonzalez, et al. "Epiretinal Membrane Formation and Macular Perfusion Findings in Rhegmatogenous Retinal Detachment Treated with Vitrectomy or Scleral Buckling." In Optical Coherence Tomography Angiography for Choroidal and Vitreoretinal Disorders – Part 2. BENTHAM SCIENCE PUBLISHERS, 2023. http://dx.doi.org/10.2174/9789815196658123010010.
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Despite the abundant literature on management options for noncomplicated macula-off rhegmatogenous retinal detachment (RRD) repair, the role of the corresponding long-term postoperative macular perfusion indices and their correlation with the postoperative epiretinal membrane (ERM) formation remain vaguely understood. In this chapter, we have analyzed the incidence of postoperative ERM proliferation and the differences in the corresponding postoperative macular perfusion indices in patients who underwent two well-known surgical approaches for noncomplicated macula-off RRD. Postoperative microstructural and perfusional findings were compared, and their correlation with best-corrected visual acuity (BCVA), postoperatively, was assessed. Two study groups based on the surgical procedures performed for noncomplicated macula-off RRD were analyzed. The postoperative incidence of ERM was 23.2% and 23.63% in the buckle vitrectomy groups, respectively (p>0.05). The RRD recurrence rates in the buckle and vitrectomy groups were 8.8% and 1.82%, respectively (p>0.001). The mean BCVA values before ERM removal in the buckle and vitrectomy groups were 0.40±0.33 log of the minimum angle of resolution (logMAR) and 0.47±0.19 logMAR, respectively (p<0.05). The final mean postoperative BCVA in the buckle and vitrectomy groups were 0.43±0.14 logMAR and 0.28±0.19 logMAR, respectively (p<0.05). When the retinal perfusional indices of the buckle and vitrectomy groups were compared with the normal control group, all the perfusional indices differed significantly (p<0.01).
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MD, Miguel A. Quiroz-Reyes, Erick A. Quiroz-Gonzalez, Jorge Morales-Navarro, et al. "Evaluation of Macular Perfusion in Successfully Reattached Macula-off Diabetic Tractional Retinal Detachment." In Optical Coherence Tomography Angiography for Choroidal and Vitreoretinal Disorders - Part 1. BENTHAM SCIENCE PUBLISHERS, 2023. http://dx.doi.org/10.2174/9789815124095123010014.
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Current imaging techniques based on optical coherence tomography (OCT) angiography are useful for observing different retinal microcirculation patterns. The primary purpose of this chapter was to describe the functional, structural, and serial perfusion postoperative outcomes of successfully reattached macula-off tractional retinal detachment (TRD). Patients who underwent a successful diabetic vitrectomy were analyzed. The mean differences between the preoperative best-corrected visual acuity (BCVA), 3-month BCVA, and final postoperative BCVA were statistically significant (p < 0.05). The duration of vision loss before surgery was 11.6 ± 2.3 weeks (mean ± standard deviation (SD)). The mean duration (± SD) of the resolution of macular detachment was 3.6 ± 1.7 weeks in the pure macular TRD group and 1.8 ± 0.8 weeks in the combined tractional and rhegmatogenous macular detachment (p < 0.05) group. The mean follow-up duration of all patients was 11.4 ± 5.7 months (mean ± SD). Longitudinal multimodal imaging tests revealed abnormal superficial and deep microcirculation patterns with multiple microabnormalities in the foveal avascular zone and different but distinct areas of the non-perfused macula in different OCT angiography slabs. Additionally, disorganization of the retinal inner layers and chronic ischemic macular edema were observed in 82% of eyes examined using the spectral domain (SD) OCT. Therefore, these data suggest that despite the successful anatomical reattachment of the macula, long-term postoperative microcirculatory abnormalities were detected in both groups; however, these abnormalities were predominantly accompanied by severe persistent ischemia in the recurrent TRD group due to the presence of multiple microcirculatory defects.
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MD, Miguel A. Quiroz-Reyes, Erick A. Quiroz-Gonzalez, Miguel A. Quiroz-Gonzalez, Ahmad R. Alsaber, Sanjay Marasini, and Virgilio Lima-Gomez. "Postoperative Analysis of Macular Perfusional Status in Giant Retinal Tear-Related Retinal Detachments." In Optical Coherence Tomography Angiography for Choroidal and Vitreoretinal Disorders - Part 1. BENTHAM SCIENCE PUBLISHERS, 2023. http://dx.doi.org/10.2174/9789815124095123010012.
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Rhegmatogenous retinal detachment (RRD) associated with giant retinal tears (GRTs) can cause significant visual impairment due to structural or perfusional macular sequelae. This condition is an acute-onset incident that leads to a full-thickness circumferential retinal tear of at least 90°. Limited data are available concerning the patients´ long-term perfusional status after successful surgery for GRTs with macula.off RRD. This chapter examines the long-term outcomes of eyes treated with varying degrees of GRT-associated RRD extensions and compares them with those of two control groups. The surgical group was subdivided according to GRT-associated RRD extension as follows: eyes with extension of <180° and eyes with extension > of >180°. The eyes were further classified according to whether complementary 360° scleral buckle (SB) placement was required. Postoperative optical coherence tomography (OCT) demonstrated that 33.3% of the eyes had abnormal foveal contours, 39.4% had ellipsoid zone (EZ) disruption, 2 had dissociated optic nerve fiber layer (DONFL) defects, and 45.4% had external limiting membrane (ELM) line discontinuities. OCT angiography (OCT-A) revealed abnormal perfusion indices in surgically treated eyes (p<0.0001). Postsurgical best-corrected visual acuity (BCVA) was negatively correlated with the superficial foveal avascular zone area, superficial parafoveal vessel density, and central subfoveal thickness but positively correlated with the choriocapillaris flow area (CFA). Moreover, eyes treated surgically for GRT-associated RRD had multiple structural alterations reflected by spectral-domain OCT biomarkers and OCT-A perfusional findings correlated with visual outcomes. Despite successful retinal reattachment without proliferation, management of GRT-associated RRD remains challenging.
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Penman, Alan D., Kimberly W. Crowder, and William M. Watkins. "Grid Pattern Photocoagulation for Macular Edema in Central Vein Occlusion." In 50 Studies Every Ophthalmologist Should Know. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780190050726.003.0023.
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The Central Vein Occlusion Study (CVOS) was a randomized, controlled, clinical trial to determine whether treatment with macular grid photocoagulation improved or preserved visual acuity in eyes with macular edema involving the fovea secondary to nonischemic central retinal vein occlusion (CRVO) and best corrected visual acuity of 20/50 or worse. The study found that, overall, visual acuity results were not different for treated and control eyes. Based on this, the standard of care at that time continued to be observation. (Treatment with intravitreal anti–vascular endothelial growth factor [VEGF] agents is now the standard of care.)
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Penman, Alan D., Kimberly W. Crowder, and William M. Watkins. "Argon Laser Photocoagulation for Macular Edema in Branch Vein Occlusion." In 50 Studies Every Ophthalmologist Should Know. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780190050726.003.0021.
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The Branch Vein Occlusion Study (BVOS) was a randomized, incompletely masked, controlled clinical trial in patients with a branch retinal vein occlusion (BRVO) occurring 3 to 18 months earlier, with best corrected visual acuity of 20/40 or worse from macular edema. The study showed that argon laser grid photocoagulation could improve visual acuity in eyes with BRVO and macular edema reducing visual acuity to 20/40 or worse. After this study, grid photocoagulation of the macula became the standard of care for BRVO with macular edema with foveal involvement and capillary leakage with visual acuity of 20/40 or worse, and it remains the gold standard therapy for perfused macular edema in BRVO. Advantages are that it is proven, widely available, nonsurgical, and of relatively moderate cost.
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Penman, Alan D., Kimberly W. Crowder, and William M. Watkins. "Argon Laser Photocoagulation for Extrafoveal Neovascular Maculopathy." In 50 Studies Every Ophthalmologist Should Know. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780190050726.003.0037.
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The Macular Photocoagulation Study (MPS) comprised three randomized clinical trials: the Senile Macular Degeneration Study (SMDS), the Ocular Histoplasmosis Study (OHS), and the Idiopathic Neovascularization Study (INVS). The goal was to determine whether, in patients with visual symptoms due to choroidal neovascularization outside the fovea (at least 200 microns from the center of the foveal avascular zone and a best corrected visual acuity of 20/100 or better caused by senile macular degeneration (now known as age-related macular degeneration), histoplasmosis, or idiopathic causes, argon blue-green laser photocoagulation prevents significant loss of visual acuity. Based on the study findings, the authors recommended that eyes with well-defined extrafoveal choroidal neovascular membranes should be treated with argon blue-green laser photocoagulation to prevent or delay significant loss of visual acuity.
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Bulmann, Jennifer K. "Low Vision and Aniridia." In Aniridia and WAGR Syndrome. Oxford University Press, 2010. http://dx.doi.org/10.1093/oso/9780195389302.003.0011.
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Aniridia affects many visual aspects of one’s life. This chapter will highlight many of these effects. Functional changes that occur due to aniridia will be discussed. Once the patient’s vision is assessed and goals are established with a thorough eye examination, numerous avenues can be taken to ensure the support of all the patient’s health care providers. Referrals can be made to appropriate professionals to ensure full understanding and management of the ocular condition. Visual acuity is the measurement used to determine vision levels. Normal vision is 20/20, which means that what a normal person sees at 20 feet, the patient sees at 20 feet. If their vision is 20/40, they would need to be at a distance of 20 feet to see what someone with normal vision can see at 40 feet. The decrease in visual acuity in those with aniridia usually ranges from under 20/60 to as low as approximately 20/400. This is due to the lack of development of the macular area, or fovea. The fovea is responsible for our clearest, most precise vision. Those with visual acuity of 20/200 or worse that is best corrected while wearing spectacles or contact lenses in the better-seeing eye are considered legally blind. While most people who suffer from aniridia are not legally blind, they are visual impaired. Visual impairment is defined as visual acuity of 20/70 in the better-seeing eye when optimally corrected with glasses or contact lenses. The designation of “visual impairment” also has a functionality factor. If a person has a reduction in the ability of the eye or the visual system to perform to a normal ability, he/she is considered visually impaired. Visual field is the measurement of peripheral vision. Those with aniridia may have decreased peripheral vision. This is not directly due to aniridia, but rather to glaucoma, which may develop due to structural changes in the eye. Glaucoma is explained in detail in the glaucoma chapter of this book.
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Brody, David L. "Blurry Vision." In Concussion Care Manual. Oxford University Press, 2014. http://dx.doi.org/10.1093/med/9780199383863.003.0020.
Full textAbstract:
Blurry vision after concussion can mean many different things. A loss of acuity in one eye is often due to direct injury to the eye. Intact acuity in each eye, but worse vision with both eyes open is often due to a subtle cranial nerve injury. Subtle 3rd cranial nerve or 4th cranial injuries typically cause vision to be worse looking up or down, whereas 6th nerve injuries are typically worse looking to one side. Visual attention deficit is sometimes described as blurry vision. Migraine auras often cause visual impairment. The chapter suggests modes of treatment for these situations. Paroxysmal changes in vision after concussion should be treated as presumptive migraine, or migraine equivalent even if there is no severe headache. Patients will benefit from best-corrected vision when starting aggressive cognitive rehabilitation even if preexisting visual impairments did not impair them much in everyday life before the concussion.
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Penman, Alan D., Kimberly W. Crowder, and William M. Watkins. "Photodynamic Therapy of Subfoveal Choroidal Neovascularization in Age-Related Macular Degeneration with Verteporfin." In 50 Studies Every Ophthalmologist Should Know. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780190050726.003.0038.
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In this chapter, report 1 of the Treatment of Age-Related Macular Degeneration with Photodynamic Therapy (TAP) study details the one-year results of two double-masked, placebo-controlled, randomized clinical trials to determine whether photodynamic treatment with verteporfin reduces the risk of vision loss in patients with age-related macular degeneration (AMD) due to subfoveal choroidal neovascularization (CNV) measuring 5400 µm or less in greatest linear dimension with evidence of classic CNV and best-corrected visual acuity of approximately 20/40 to 20/200. At the month-12 examination, 61% of eyes assigned to verteporfin compared with 46% of eyes assigned to placebo had lost fewer than 15 letters of visual acuity from baseline). Verteporfin therapy was found to be safe and effective in reducing the risk of vision loss, and the authors recommended verteporfin therapy for treatment of patients with predominantly classic CNV from AMD.
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Brody, David L. "Blurry Vision." In Concussion Care Manual, edited by David L. Brody. Oxford University Press, 2019. http://dx.doi.org/10.1093/med/9780190054793.003.0021.
Full textAbstract:
Blurry vision after concussion can mean different things. A loss of acuity in one eye is often due to direct injury to the eye, which happens frequently in concussion. Refer to ophthalmology right away. Intact acuity in each eye, but worse vision with both eyes open is often due to a subtle cranial nerve injury. Subtle third cranial nerve or fourth cranial injuries typically cause vision to be worse looking up or down, whereas sixth nerve injuries are typically worse looking to one side. Consider referral to neuro-ophthalmology and an ocular rehabilitation prescription. Visual attention deficit is sometimes described as blurry vision. Treat the attention deficit. Migraine auras often cause visual impairment of some kind: distorted vision, double vision, loss of central vision, loss of vision on one side of the visual world, sparkling lights, jagged lines, and so forth. Paroxysmal changes in vision after concussion should be treated as presumptive migraine, or migraine equivalent even if there is not a severe headache. Patients will benefit from best corrected vision when starting aggressive cognitive rehabilitation even if preexisting visual impairments didn’t impair them much in everyday life before the concussion.
Conference papers on the topic "Best corrected visual acuity (BCVA)"
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Casson, E. J., W. B. Jackson, G. Mintsioulis, S. Norton, R. Munger, and U. Strolenberg. "Visual Performance Under Dilated Conditions Following Excimer Photorefractive Keratectomy." In Vision Science and its Applications. Optica Publishing Group, 1996. http://dx.doi.org/10.1364/vsia.1996.suc.1.
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The goal of photorefractive keratectomy (PRK) is to correct refractive error permanently and provide patients with optimized visual performance without corrective lenses. If high contrast visual acuity is used as the measure of visual performance, numerous studies can document the stability and predictability of PRK, particularly for mild to moderate myopes. The vast majority of individuals in these studies remain within one line of their pre-operative, best-corrected acuity, while greatly improving their uncorrected visual acuity.1-4
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Casson, E. J., W. B. Jackson, and G. Mintsioulis. "High and Low Contrast Acuity Following Excimer Photorefractive Keratectomy." In Vision Science and its Applications. Optica Publishing Group, 1995. http://dx.doi.org/10.1364/vsia.1995.fc4.
Full textAbstract:
Studies of photorefractive keratecomy (PRK), have generally concentrated on determining the refractive outcome of the surgery. These studies determined that PRK produces predictable and stable results, particularly for mild to moderate myopes.1-4 Visual function estimates in these studies are usually limited to high contrast acuity and show that the vast majority of individuals remain within one line of their pre-operative, best-corrected acuity, while greatly improving their uncorrected visual acuity.5
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Applegate, Raymond A. "Measuring visual performance as a function of pupil size in clinical populations." In OSA Annual Meeting. Optica Publishing Group, 1992. http://dx.doi.org/10.1364/oam.1992.tuuu2.
Full textAbstract:
The eye's pupil defines the area of each optical surface used to form the retinal image. Intervention (e.g., radial keratotomy, photorefractive keratectomy, displaced IOL) and/or pathology (e.g., corneal degeneration or scarring) can markedly change the optical properties of the eye and aggravate or improve visual performance as a function of pupil size. The following constraints make measurement of these properties difficult: 1) the use of an artificial pupil placed in front of the eye, as opposed to natural pupil plane; 2) selection and maintenance of a relevant reference axis; and 3) selection and quantification of a reasonable psychophysical task. We address these constraints by employing 1) a Maxwellian view system with a variable exit pupil diameter imaged in the plane of the eye's entrance pupil; 2) a Thibos foveal achromatic alignicator to define the reference axis; and 3) a high contrast Bailey-Lovie acuity chart and a fixed letter scoring criteria. Measurements on patients prior to and after radial keratotomy and photorefractive keratectomy demonstrate that best corrected visual acuity is generally decreased following intervention for large pupils and is generally unchanged for small pupils.
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Wang, Yiyi, Tammy Ma, Melanie Mason, William Tuten, and Austin Roorda. "Multimodal, longitudinal imaging of laser retinal injury." In ILSC 2023: Proceedings of the International Laser Safety Conference. Laser Institute of AmericaLIA, 2023. http://dx.doi.org/10.2351/7.0001492.
Full textAbstract:
This case report demonstrates the use of novel imaging techniques with adaptive optics scanning laser ophthalmoscope and adaptive-optics-based psychophysical tests to longitudinally evaluate retinal structure and function following a laser retinal injury after accidental exposure to a 1-watt infrared laser beam. The structural and functional prognosis could be predicted with clinical findings, high-resolution retinal imaging, and visual psychophysical tests. A 23-year-old researcher was unwittingly exposed to a 1-watt, 852 nm continuous-wave laser at work as a small central blurry spot in the right eye appeared after 10 seconds of exposure. An initial eye examination was performed 1 day after the exposure and the best-corrected visual acuity of the affected eye was 20/25-2. The posterior segment evaluation of the right eye revealed a disrupted outer retinal structure near the fixation. Adaptive optics imaging 2 weeks after the exposure revealed a 0.50x0.75-degree elliptical retinal area with irregular borders and abnormal cone photoreceptor reflectivity just below the fixation. Starting the one-month follow-up, retinal structural recovery was observed on Optical Coherence Tomography (OCT). Subsequent adaptive optics imaging showed significant recovery of the cone reflectivity. Importantly, adaptive optics microperimetry which measures small-spot retinal function at the cellular level with real-time eye tracking showed measurable retinal sensitivities at all affected areas at the 6-month follow-up visit, which later restored normal sensitivity at 10 months. Retinal structure and function from laser injury can be visualized and measured with diagnostic instruments including OCT, adaptive optics imaging, and psychophysics. Adaptive optics microperimetry showed retinal functional recovery at 10 months follow-up. The areas with abnormal cone reflectivity could be on a path to near or full recovery.
Reports on the topic "Best corrected visual acuity (BCVA)"
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Almasri, Malaz, Amjad Ghareeb, Abdulrahman Ismaiel, Daniel-Corneliu Leucuta, and Simona Delia Nicoara. The role of Nepafenac in the prevention of macular swelling and its repercussions on visual outcome after cataract surgery - A systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, 2022. http://dx.doi.org/10.37766/inplasy2022.9.0004.
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Review question / Objective: P – diabetic and non-diabetic patients undergoing phacoemulsification without macular edema; I – Nepafenac 0.1% or Nepafenac 0.3% in addition to topical steroids; C – topical steroids alone; O – Mean Differences of Foveal thickness (FT), total macular volume (TMV), best corrected visual acuity (BCVA), and intraocular pressure (IOP); S – Randomized controlled trials (RCTs). Condition being studied: Macular swelling or macular edema after cataract surgery when uncontrolled may compromise the blood-ocular barrier and allow inflammatory cells and cytokines to enter the aqueous humor, resulting in discomfort for the patient, a slower rate of recovery, subpar visual results, and even more complications like the development of synechiae, increased IOP, macular edema (ME), corneal edema, and so forth.