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Journal articles on the topic 'Keratometry outcome'

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1

Pereira, Arpitha. "Comparing the corneal curvatures obtained from three different keratometers-IOL Master, Bausch & Lomb Manual keratometer and TOPCON KR 8800 autokeratometer." International Eye Research 1, no. 1 (2020): 13–16. http://dx.doi.org/10.18240/ier.2020.01.03.

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AIM: To compare the corneal curvature and to investigate the agreement between three different keratometers. METHODS: In this prospective study, keratometry was performed using an IOL Master, a Bausch & Lomb manual keratometer and TOPCON KR-8800 autokeratometer on 252 eyes of patients recruited from camps for cataract surgery. The average keratometry values were recorded and compared. The agreements between the instruments were analyzed using the Bland Altman statistical method. The main outcome measure was average keratometry values.RESULTS: The mean corneal power was 44.62±1.52 D with th
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Magar, JB Ale. "Comparison of the corneal curvatures obtained from three different keratometers." Nepalese Journal of Ophthalmology 5, no. 1 (2013): 9–15. http://dx.doi.org/10.3126/nepjoph.v5i1.7815.

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Introduction: Keratometry forms an important component of the biometry for a calculation of the intraocular lens power and selecting a contact lens’ parameters. Objective: To investigate the agreement between three different keratometers commonly used in an ophthalmology clinic. Materials and methods: In this prospective study, keratometry was performed using an IOL Master (IM), a manual keratometer (Man) and a autokeratometer (Top) in twenty five eyes of thirteen volunteer subjects. The average keratometry values and corneal astigmatism (J180 and J45 components) were computed and compared. Th
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Mohamed Mostafa, Engy. "Effect of Flat Cornea on Visual Outcome after LASIK." Journal of Ophthalmology 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/794854.

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Purpose. To evaluate the effect of preoperative and postoperative keratometry on the refractive outcome after laser in situ keratomileusis (LASIK) for moderate and high myopia.Methods. Records of 812 eyes (420 patients) with myopia ≥−6 D who had LASIK at Sohag Laser Center, Egypt, from January 2010 to November 2013, were retrospectively analyzed. Main outcome measures were postoperative corrected distance visual acuity (CDVA), postoperative spherical equivalence, and postoperativeQfactor.Results. LASIK was performed in 812 eyes (mean age21.8±5.2years). Patients were grouped according to the de
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Alfaqawi, Fadi, Luca Pagano, Esmaeil M. Arbabi, et al. "Cataract surgery has minimal effect on corneal shape." BMJ Open Ophthalmology 10, no. 1 (2025): e001920. https://doi.org/10.1136/bmjophth-2024-001920.

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PurposeTo quantify the effect of cataract surgery on cornea shape.MethodsPatients undergoing cataract surgery with standardised 2.75 mm surgical incisions at 110 degrees with a side port at 50 degrees were included. Repeat biometric measurements were taken before surgery and at 6 weeks on both operated and unoperated fellow eyes. Data were transformed into Long’s formalism for analysis. Device-specific measurement error was determined. The main outcome measure was the change in keratometry taking into account the change in keratometry of the unoperated fellow eye. Secondary outcome measures in
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Bhatta, Sabitri, Sagun Narayan Joshi, Madhu Thapa, Suresh Awasthi, Gauri Shankar Shrestha, and Niraj Dev Joshi. "Prediction and Estimation of Postoperative Refractive Error in Phacoemulsification: Using Ultrasound A-Scan and Intra Ocular Lens Master." Journal of Nepal Health Research Council 22, no. 03 (2024): 494–501. https://doi.org/10.33314/jnhrc.v22i03.4854.

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Background: This study aims to predict and estimate the postoperative refractive outcome in participants undergoing phacoemulsification using IOL Master and A-scan biometry.Methods: A cross-sectional study was done where ninety eyes of 90 participants undergone phacoemulsification using SRK/T formula were included in longitudinal research. Each participant underwent axial length (AL) measurement by IOL Master and A-scan, and keratometry reading (k- reading) by manual TOPCON keratometer and automated keratometer on IOL master for IOL power calculation. All the pre-operative measurements between
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6

Luna, Mahfuja Khanam, S. Faisal Ahmed, Syeed Mehbub Ul Kadir, Arup Ratan Ray, and Somir Hossain. "Residual astigmatism following cataract surgery." Anwer Khan Modern Medical College Journal 13, no. 1 (2021): 42–46. http://dx.doi.org/10.3329/akmmcj.v13i1.64728.

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Objective: To determine the amount of residual astigmatism following cataract surgery.
 Materials and methods: A hospital based observational study was conducted in a tertiary eye hospital, Bangladesh during the period of July, 2013 to June, 2014. Patients was selected for the study who diagnosed as ARC with variable amount of astigmatism (1.5 to 3.5D), and excluded any other ocular pathology or history of previous ocular surgery. Phacoemulsification with PC Toric IOL implantation in all cases. Auto refracto-keratometer was done Preoperative and postoperatively for assessing the astigmati
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Dr., Shakeel Ahmad Dr. Samra Kanwal Dr. Muhammad Haroon Haider. "THE OUTCOME OF USING (5.5 MM) SELF-SEALING LIMBAL INCISION FOR EYES WITH (1.5 – 3.0) D PRE-EXISTING ASTIGMATISM ON THE STEEPEST MERIDIAN." INDO AMERICAN JOURNAL OF PHARMACEUTICAL SCIENCES 05, no. 08 (2018): 8187–91. https://doi.org/10.5281/zenodo.1407498.

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<strong><em>Objective: </em></strong><em>The research objective is to calculate keratometry results of a 5.5 mm self-sealing incision in eyes, having astigmatism pre-existed, on the sharpest/steepest meridian.</em> <strong><em>Methodology: </em></strong><em>A prospective researched method was observed upon thirty-five eyes having astigmatism (with or against 1.5 to 3 D) pre-existed at Service Hospital, Lahore (October 2016 September 2017). A 1.5 mm incision, 120 degrees approximate separation each, was used for the performance of Bi-manual phaco. A third self-sealing limbal incision which was
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8

Dong, Jing, Yaqin Zhang, and Xiaogang Wang. "Calculation of Toric Intraocular Lens Power with the Barrett Calculator and Data from Three Keratometers." Journal of Tropical Medicine 2021 (August 20, 2021): 1–6. http://dx.doi.org/10.1155/2021/7712345.

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Aim. To investigate the interdevice agreement for differences in toric power calculated using data on anterior corneal astigmatism obtained with corneal topography/ray-tracing aberrometry (iTrace), partial coherence interferometry (IOLMaster 500), and Scheimpflug imaging (Pentacam). Methods. The analysis included 101 eyes (101 subjects) with regular astigmatism. The main outcome measures were corneal cylinder power, axis of astigmatism, and keratometry values. Toricity and toric IOL power were calculated using the online Barrett toric calculator. Interdevice agreement for measurement and calcu
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9

Olsen, Hanne, Niels Ehlers, and Jesper Ø. Hjortdal. "Value of intraoperative keratometry in predicting outcome of radial keratotomy." Acta Ophthalmologica Scandinavica 75, no. 4 (2009): 398–400. http://dx.doi.org/10.1111/j.1600-0420.1997.tb00397.x.

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10

Levy, Issac, Ritika Mukhija, and Mayank A. Nanavaty. "Corneal Allogenic Intrastromal Ring Segments: A Literature Review." Journal of Clinical Medicine 14, no. 4 (2025): 1340. https://doi.org/10.3390/jcm14041340.

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Background: Corneal allogenic intrastromal ring segments (CAIRSs) offer a novel, biocompatible alternative to synthetic intracorneal ring segments (ICRSs). This review aims to evaluate the clinical outcomes of CAIRS. Methods: Inclusion criteria were studies with a minimum of 20 eyes and six months of follow up. The primary outcome measure was uncorrected distance visual acuity (UDVA). The secondary outcomes were a change in corrected distance visual acuity (CDVA), spherical equivalent (SE), mean keratometry (K-mean), maximum keratometry (K-max), K1, K2, and pachymetry. Results: The primary out
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Nithyapriya, Chinnaraju, Elango Vidhya, and Balaji Sriram. "Study of Post-Operative Complications of Phacoemulsification and its Visual Outcome in Chidambaram, Tamil Nadu." International Journal of Pharmaceutical and Clinical Research 15, no. 5 (2023): 1345–54. https://doi.org/10.5281/zenodo.12598941.

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<strong>Background:&nbsp;</strong>Cataract remains the leading cause of curable blindness in the world. In India, Cataract is responsible for 50-80% of the bilaterally blind. At present Phacoemulsification is fast growing in popularity and is opted as a surgery of choice for cataract extraction due to its various advantages. But phacoemulsification has its own share of complications and a long learning curve. This study is focussed upon the post-operative complications of phacoemulsification.&nbsp;<strong>Methods:&nbsp;</strong>This is a prospective study of a group of 50 patients who underwen
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Viswanathan, Deepa, Nikhil L. Kumar, and John J. Males. "Outcome of Corneal Collagen Crosslinking for Progressive Keratoconus in Paediatric Patients." BioMed Research International 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/140461.

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Purpose. To evaluate the efficacy of corneal collagen crosslinking for progressive keratoconus in paediatric patients.Methods. This prospective study included 25 eyes of 18 patients (aged 18 years or younger) who underwent collagen crosslinking performed using riboflavin and ultraviolet-A irradiation (370 nm, 3 mW/cm2, 30 min).Results. The mean patient age was 14.3 ± 2.4 years (range 8–17) and mean followup duration was 20.1 ± 14.25 months (range 6–48). Crosslinked eyes demonstrated a significant reduction of keratometry values. The mean baseline simulated keratometry values were 46.34 dioptre
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Thapa, Bikram Bahadur, Y. Dhakal, J. K. Verma, and P. Manandhar. "Ocular Biometry and Corneal Astigmatism in Patients Undergoing Cataract Surgery in Bheri Zone of Nepal." Journal of Nepalgunj Medical College 15, no. 2 (2017): 53–57. http://dx.doi.org/10.3126/jngmc.v15i2.22846.

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Introduction: Accurate measurement of ocular axial length, keratometry and anterior chamber depth before cataract surgery is crucial for calculating the power of intraocular lens (IOL) to be implanted. Corneal astigmatism is one of the major thefts to have best postoperative unaided visual acuity. Thus, knowing it preoperatively and taking appropriate intervention during surgery provides best postoperative visual outcome. But there are no studies on corneal astigmatism and biometric parameters in the population of Bheri Zone.&#x0D; MATERIAL AND METHOD: The medical records of the patients who h
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Raihan, Mohammad Hussain, Farah Hossaini Kabir, Kamrul Hasan Khan, Natasha Kajmina, A. K. M. Rashedul Hasan, and Mohammad Mahbubul Hasan. "Study on Outcome of Phacoemulsification Cataract Surgery with Clear Corneal Steep Axis Incision." Community Based Medical Journal 13, no. 1 (2024): 41–45. http://dx.doi.org/10.3329/cbmj.v13i1.71073.

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A prospective, observational study was conducted in the Department of Ophthalmology, Combined Military Hospital (CMH), Dhaka, Bangladesh, from April to October of 2019, to observe the outcome and determine the amount of surgically induced astigmatism in phacoemulsification cataract surgery done with clear corneal incision. A total of 60 patients were included in this study. Cataract extraction was done in all the patients by phacoemulsification through clear corneal incision with foldable intraocular lens implantation. All the surgeries were done with INTREPID Micro-Coaxial system using the IN
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15

Langenbucher, Achim, Nóra Szentmáry, Alan Cayless, et al. "Repeatability of corneal measurements from the Casia2 anterior segment tomographer in a cataractous population." PLOS One 20, no. 7 (2025): e0328894. https://doi.org/10.1371/journal.pone.0328894.

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Purpose The purpose of this study was to investigate the repeatability of corneal power and thickness measures in a large patient cohort. Methods In this retrospective non-randomised cross sectional single-centre study we evaluated a dataset containing 900 Casia2 anterior segment tomography measurements from 300 eyes from 300 patients (3 repeat measurements each) taken prior to cataract surgery. Only complete measurements marked as ‘Successful’ and with a sequence of 3 measurements for each eye performed on the same day were considered. Keratometry (K), corneal back surface (P) and RealPower (
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16

Sankar Roy, Shib, Saptarshi Mukherjee, and Abhishek Sharma. "Evaluation of Biometry Parameters of patients from a Tertiary Eye Care Centre." International Journal of Health Sciences and Research 12, no. 8 (2022): 64–70. http://dx.doi.org/10.52403/ijhsr.20220809.

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Background: To evaluate the distribution of A- scan Biometry parameters and Corneal Astigmatism before Cataract Surgery in patients from a Tertiary Eye Care Centre. Methods: Cataract patients were recruited at a Tertiary Eye Care Hospital. Ocular axial length (AL), Lens thickness (LT), keratometry values, anterior chamber depth (ACD) and horizontal corneal diameter (white to white [WTW]) of each cataract-affected eye were measured using the Axis Nano Device (Immersion Technique). Results: The study evaluated 418 eyes of 209 cataract patients. The mean AL, ACD, and WTW were 23.17±1.81 mm, 3. 25
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Kern, C., K. Kortüm, M. Müller, A. Kampik, S. Priglinger, and W. J. Mayer. "Comparison of Two Toric IOL Calculation Methods." Journal of Ophthalmology 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/2840246.

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Purpose. To compare two calculators for toric intraocular lens (IOL) calculation and to evaluate the prediction of refractive outcome. Methods. Sixty-four eyes of forty-five patients underwent cataract surgery followed by implantation of a toric intraocular lens (Zeiss Torbi 709 M) calculated by a standard industry calculator using front keratometry values. Prediction error, median absolute error, and refractive astigmatism error were evaluated for the standard calculator. The predicted postoperative refraction and toric lens power values were evaluated and compared after postoperative recalcu
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Rab, Jewell Ilias, Barna, Md Ashiqur Rahman Akanda, and Debabrata Paul. "Changes in Visual Acuity and Keratometry Readings following Pterygium Excision: A Study in A Public Medical College Hospital." Journal of National Institute of Ophthalmology 5, no. 2 (2022): 25–30. http://dx.doi.org/10.3329/jnio.v5i2.66788.

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Introduction: Pterygium is a degenerative, triangular wing shaped, fibro vascular connective tissue of bulbar conjunctiva towards and onto the cornea, leading to significant astigmatism. It is a common ophthalmic condition of tropical and sub-tropical country like Bangladesh where there is dry sunny hot dusty climate.&#x0D; Purpose: To find out the change in visual acuity and keratomety before and after pterygium excision and effect of different grades of pterygium on the final outcome.&#x0D; Methods: This prospective study was carried out from March 2021 to December 2021 at Ophthalmolgy Depar
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Thapa, Bikram Bahadur, Basu Prasad Adhikari, Nanda Kumari Gurung, and Jitendra Kumar Verma. "Preoperative Biometry and Uncorrected Visual Outcome Following Cataract Surgery at a Teaching Hospital at Western Part of Nepal." Journal of Nepalgunj Medical College 19, no. 1 (2022): 64–68. http://dx.doi.org/10.3126/jngmc.v19i1.40260.

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Introduction: Proper preoperative biometry in cataract surgery provides expected postoperative uncorrected visual outcome. Astigmatism is one of the major problems to achieve best postoperative unaided visual acuity. Aims: To determine the distribution of biometric parameter and unaided visual outcome in the cataract patients operated at Nepalgunj medical college, Banke, Nepal. Methods: The patients who underwent cataract surgery between January 2019 and December 2020 at Nepalgunj medical college were studied. Patient’s demographic parameter, keratometric value, anterior chamber depth, lens th
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Agha, Bishr, Nura Ahmad, Daniel G. Dawson, Thomas Kohnen, and Ingo Schmack. "Refractive outcome and tomographic changes after Descemet membrane endothelial keratoplasty in pseudophakic eyes with Fuchs’ endothelial dystrophy." International Ophthalmology 41, no. 8 (2021): 2897–904. http://dx.doi.org/10.1007/s10792-021-01850-w.

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Abstract Purpose To analyze refractive and topographic changes secondary to Descemet membrane endothelial keratoplasty (DMEK) in pseudophakic eyes with Fuchs’ endothelial dystrophy (FED). Methods Eighty-seven pseudophakic eyes of 74 patients who underwent subsequent DMEK surgery for corneal endothelial decompensation and associated visual impairment were included. Median post-operative follow-up time was 12 months (range: 3–26 months). Main outcome measures were pre- and post-operative manifest refraction, anterior and posterior corneal astigmatism, simulated keratometry (CASimK) and Q value o
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AlHilali, Sara M., Deema E. Jomar, and Eman D. Albalawi. "Visual outcomes and recurrence rate of macular corneal dystrophy following phototherapeutic keratectomy in Saudi Arabia." Saudi Journal of Ophthalmology 37, no. 4 (2023): 337–41. http://dx.doi.org/10.4103/sjopt.sjopt_194_22.

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Abstract PURPOSE: The purpose of the study was to evaluate the visual outcomes and recurrence rate of patients with macular corneal dystrophy (MCD) who have undergone phototherapeutic keratectomy (PTK). METHODS: This retrospective, single-centered study enrolled patients from King Khaled Eye Specialist Hospital who had undergone PTK for MCD between 2000 and 2020. Pre-, intra-, and post-operative data were collected, and the primary outcome measures included uncorrected visual acuity, best-corrected visual acuity (BCVA), spherical equivalent, central keratometry, keratometric astigmatism, recur
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Virdi, Devansh, Shalini Gupta, Swati Tomar, and Tejinder Singh Ahluwalia. "Bilateral simultaneous accelerated corneal collagen cross-linking in pediatric keratoconus: 24-month follow-up results." Indian Journal of Ophthalmology 73, no. 5 (2025): 769–74. https://doi.org/10.4103/ijo.ijo_1967_24.

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Purpose: To study the long-term clinical outcome of the bilateral simultaneous accelerated corneal collagen cross-linking (ACXL) procedure in progressive keratoconus in the pediatric population at 24-month follow-up. Methods: This is a retrospective cross-sectional study that included 39 patients (78 eyes) with progressive pediatric keratoconus treated with epi-off bilateral ACXL in the same sitting between 2018 and 2022. The change in pre-operative vs. post-operative distance-corrected visual acuity (DCVA), average keratometry, maximum keratometry (Kmax), and thinnest corneal thickness (TCT)
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Prager, Thomas C., David R. Hardten, and Benjamin J. Fogal. "Enhancing Intraocular Lens Outcome Precision: An Evaluation of Axial Length Determinations, Keratometry, and IOL Formulas." Ophthalmology Clinics of North America 19, no. 4 (2006): 435–48. https://doi.org/10.1016/j.ohc.2006.07.009.

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Baig, Taiba, and Tahira Afzal Khan. "Role of Corneal Collagen Cross Linking in Halting the Progression of Keratoconus: A Contralateral Eye Study." Pakistan Journal of Medical and Health Sciences 16, no. 9 (2022): 356–58. http://dx.doi.org/10.53350/pjmhs22169356.

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Objective: To assess the efficacy of Corneal Collagen Cross-Linking in preventing the progression of Keratoconus by comparing changes in Maximum Simulated Keratometry (K-max) in treated and untreated eye of the same patient. Methodology: All the cases, that met the inclusion/exclusion criteria (with complete pre-operative examinations), were enrolled in the study. Patients gave informed permission. In each patient, a computerized random number table was used to pick one eye for treatment and the other as a control. Patients were told to stop wearing hard contact lenses 3 weeks before the treat
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Williams, Lloyd B., Sonal B. Dave, and Majid Moshirfar. "Correlation of visual outcome and patient satisfaction with preoperative keratometry after hyperopic laser in situ keratomileusis." Journal of Cataract & Refractive Surgery 34, no. 7 (2008): 1083–88. http://dx.doi.org/10.1016/j.jcrs.2008.03.018.

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Singh, Shwetambari, Neha Shilpy, Dipali Purohit, and Zalak Shah. "Comparison of Percent Tissue altered in Topography Guided and Wavefront Optimized Laser-assisted in situ Keratomileusis using Zeiss MEL 80 Excimer Laser." Nepalese Journal of Ophthalmology 13, no. 2 (2021): 69–76. http://dx.doi.org/10.3126/nepjoph.v13i2.26665.

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Introduction: Laser-assisted in situ Keratomileusis (LASIK) is the most commonly performed refractive surgical procedure. The amount of tissue ablated in LASIK affects the safety and long-term outcome. The objective of this study was to compare the percent tissue altered (PTA) in topography guided (TG) and wavefront optimized (WFO) LASIK using Zeiss MEL 80 excimer laser. Materials and methods: This retrospective observational study was conducted at a tertiary eye center. Patients with moderate myopia who underwent LASIK between June 2016 and January 2019 were divided into two groups (Group I:
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Torquetti, Leonardo. "Predictors of Clinical Outcomes after Intrastromal Corneal Ring Segments Implantation." International Journal of Keratoconus and Ectatic Corneal Diseases 1, no. 1 (2012): 26–30. http://dx.doi.org/10.5005/jp-journals-10025-1005.

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ABSTRACT Purpose To evaluate the influence of age and severity of keratoconus in the clinical outcomes of implantation of Ferrara intrastromal corneal ring segments (ICRS). Methods A total of 1,073 eyes of 810 patients, consecutively operated from January 2006 to July 2008, were evaluated. Two independent analysis were made according to the age of patients and keratoconus staging. Four groups were created according to the age of patients: &lt; 20 years old, 20 to 30, 30 to 40 and &gt;40 years old. The patients were also evaluated according to the keratoconus stage (I to IV). The outcome analys
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Kamiya, Kazutaka, Shunsuke Kanayama, Masahide Takahashi, and Nobuyuki Shoji. "Visual and Topographic Improvement with Epithelium-On, Oxygen-Supplemented, Customized Corneal Cross-Linking for Progressive Keratoconus." Journal of Clinical Medicine 9, no. 10 (2020): 3222. http://dx.doi.org/10.3390/jcm9103222.

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Customized cross-linking has been proposed as an alternative to conventional cross-linking in patients with progressive keratoconus, targeting greater flattening of the cone region and improved visual function. Epithelium-on cross-linking aims to reduce complications associated with epithelial removal, while the addition of oxygen aims to maintain treatment effect. Our study evaluates the combination of these novel treatment strategies to achieve a minimally invasive treatment targeting maximal functional outcomes. This prospective study included 42 eyes undergoing epithelium-on, accelerated,
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Mounir, Amr, Ahmed H. Saghir, Gamal Radwan, and Ahmad H. Aldghaimy. "Clinical outcome of intrastromal corneal ring segment implantation with two different nomograms in keratoconus patients." Delta Journal of Ophthalmology 25, no. 1 (2024): 14–24. http://dx.doi.org/10.4103/djo.djo_49_23.

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Aim The aim of this study was to assess the clinical effects of Keraring implantation in patients with keratoconus (KC) using a newly created nomogram (NN) based on cone location and Q value compared with the manufacturer’s standard nomogram (SN). Patients and methods This is a prospective randomized controlled clinical trial that included 100 keratoconic eyes of 100 patients. The patients were randomly assigned into two groups: group NN and group SN. Group NN underwent Keraring implantation based on the newly developed nomogram, while group SN followed the manufacturer’s standard nomogram. Th
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Kalpana, B. N., Y. D. Shilpa, Sneha Priya Prabhakar, et al. "Scleral Buckling and Corneal Topography in a Rare Case of Keratoconus with Rhegmatogenous Retinal Detachment in an Indian Patient." Nepalese Journal of Ophthalmology 10, no. 1 (2018): 77–81. http://dx.doi.org/10.3126/nepjoph.v10i1.21698.

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Background: Management of Rhegmatogenous Retinal Detachment (RRD) in keratoconus could be challenging in various aspects. Visualisation of fundus due to altered reflex along with axial myopia could pose difficulty while performing pars plana vitrectomy. Our patient underwent Scleral Buckling with good anatomical results. We came across an isolated case of Keratoconus with Retinal detachment without any pre existing comorbidities unlike earlier reports where patients with history of atopic dermatitis had Keratoconus associated with RRD. The main purpose was to know the outcome of scleral buckli
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Urquieta, Isadora Pinheiro, Augusto César Nabuco de Araújo Faro, Jade Soares Dória, et al. "Corneal and refractive outcomes following intrastromal ring segment implantation in Keratoconus." Brazilian Journal of Health Review 6, no. 5 (2023): 24495–505. http://dx.doi.org/10.34119/bjhrv6n5-497.

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To evaluate the alterations in refractive and keratometric outcomes following intrastromal corneal ring segment implantation as a treatment for keratoconus. 20 eyes of 18 patients with keratoconus who underwent intrastromal corneal ring segment implantation were assessed retrospectively. The data assessed included the pre- and post-operative parameters (Kmin, Kmax, Kmedian), and the spherical and cylindrical refraction values. Age and sex of patients were also considered. Corneal topography analysis revealed an average decrease in the minimum central keratometry of 2.1, whereas a 4.0 reduction
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Lee, Dong Cheol, Se Youp Lee, and Jong Hwa Jun. "Alterations of lower- and higher-order aberrations after unilateral horizontal rectus muscle surgery in children with intermittent exotropia: A retrospective cross-sectional study." PLOS ONE 17, no. 2 (2022): e0264037. http://dx.doi.org/10.1371/journal.pone.0264037.

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Background This retrospective, cross-sectional study investigated changes in corneal lower- and higher-order aberrations that cause visual disturbance after lateral rectus recession and medial rectus resection in children. Methods Eighty-five eyes of 85 patients (44 boys; 8.64±2.88 years) who underwent lateral rectus recession and medial rectus resection to correct intermittent exotropia were assessed. The Galilei G4 Dual Scheimpflug Analyzer was used for wavefront analysis. Risk factors (age, sex, amount of surgery, preoperative axial length, preoperative intraocular pressure) were determined
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Chen, Xu, Jia-Yun Ren, Lu Wang, et al. "Axial length, vitreoretinal pathology, and anterior chamber depth can predict postoperative refractive outcomes in phacovitrectomy/silicone oil removal." International Journal of Ophthalmology 16, no. 4 (2023): 554–62. http://dx.doi.org/10.18240/ijo.2023.04.09.

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AIM: To evaluate the postoperative refractive prediction error (PE) and determine the factors that affect the refractive outcomes of combined pars plana vitrectomy (PPV) or silicone oil removal (SOR) with cataract surgery. METHODS: The study is a retrospective, case-series study. Totally 301 eyes of 301 patients undergoing combined PPV/SOR with cataract surgery were enrolled. Eligible individuals were separated into four groups according to their preoperative diagnoses: silicone oil-filled eyes after PPV (group 1), epiretinal membrane (group 2), macular hole (group 3), and primary retinal deta
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Agrawal, Garima, and Damini Patel. "Visual outcome and complications of phacoemulsification and manual small incision cataract extraction for age related cataract." Indian Journal of Clinical and Experimental Ophthalmology 10, no. 1 (2024): 170–75. http://dx.doi.org/10.18231/j.ijceo.2024.030.

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The purpose of this study is to compare visual outcome and complications of manual small incision cataract surgery (MSICS) with posterior chamber IOL implantation (PC-IOL) and phacoemulsification with posterior chamber IOL implantation for age related cataract. The study compares the visual outcome and complications of MSICS and phacoemulsification with PC-IOL performed in 80 eyes at M &amp; J Western Regional Institute of Ophthalmology (M&amp;J WRIO) Ahmedabad, by assessing post operative Best corrected Visual acuity (BCVA), Surgically Induced astigmatism (SIA) and complications. This was an
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Rashid, Md Abdur, KH Anowar Hossain, and AKM Rafiqul Islam. "Prevalence of Pre-Existing Corneal Astigmatism in Age Related Cataract Patient." Faridpur Medical College Journal 8, no. 1 (2013): 02–04. http://dx.doi.org/10.3329/fmcj.v8i1.16887.

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Cataract surgery is no more a blind rehabilitation surgery, it absolutely gives normal vision. In the era of modern cataract surgery patients expectations are also high about visual outcome. This prospective study was carried out to investigate the magnitude and pattern of pre-existing corneal astigmatism in age related cataract patient at Faridpur Medical College Hospital, Faridpur and Agha Yusuf Adhunik Hospital, Kustia, from July 2009 to June 2012. We examined 850 eyes of 730 patients who underwent cataract surgery. The mean age at the time of surgery was 61.9±8.1 (40 to 70) years. Corneal
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Rauf, Abdul, Farooq Ahmad, Muhammad Bilal Malik, Abdul Munim Khan, Hussnain Abbas, and Ayesha Khan Suri. "Comparison of Surgically Induced Astigmatism between Superior and Supero-Temporal Incisions in Manual Small Incision Cataract Surgery." Pakistan Armed Forces Medical Journal 72, no. 6 (2022): 2002–05. http://dx.doi.org/10.51253/pafmj.v72i6.3613.

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Objective: To compare visual outcomes and differences in surgically induced astigmatism between superior and supero temporal incisions in manual small incision cataract surgery (MSICS).&#x0D; Study Design: Quasi-experimental study.&#x0D; Place and Duration of Study: Combined Military Hospital, Rawalakot Pakistan, from Jan to Jun 2017.&#x0D; Methodology: Sixty patients were selected and divided into two groups of 30 patients each. One Group was given a superior incision, the other was made the supero-temporal incision, and Manual small incision cataract surgery was performed.Preoperative and po
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Farhat, Rebecca, Mohamad Khaled Ghannam, Georges Azar, et al. "Safety, Efficacy, and Predictive Factors of Conventional Epithelium-Off Corneal Crosslinking in the Treatment of Progressive Keratoconus." Journal of Ophthalmology 2020 (May 31, 2020): 1–7. http://dx.doi.org/10.1155/2020/7487186.

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Purpose. To report predictive factors of outcome of conventional epithelium-off corneal crosslinking (CXL) in the treatment of progressive keratoconus. Methods. This is a monocentric observational retrospective study conducted at Eye and Ear International Hospital, Lebanon. All patients with progressive keratoconus who underwent CXL between January 2008 and January 2016, with minimal 3-years follow-up were included. Primary treatment outcomes were maximum keratometry (K max), best-corrected distance visual acuity (CDVA), and failure. Failure was defined as an increase of 1.00 diopters (D) or m
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Trivedi, Harish R., Bhavik C. Zala, and Nitesh S. Pancholi. "A comparison of axial length measurement by using applanation A- Scan and IOL master for accuracy of predicting postoperative refraction." Indian Journal of Clinical and Experimental Ophthalmology 7, no. 3 (2021): 477–81. http://dx.doi.org/10.18231/j.ijceo.2021.095.

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The higher cost of IOL master is an issue in developing countries and hence it cannot be widely used for calculation of IOL power in such countries. Thus, the aim of the current study is to evaluate a cheaper alternative for the calculation of IOL power by comparing the axial length measurement obtained using applanation A-scan with that of IOL Master for accuracy of predicting postoperative refraction.A prospective, randomized, comparative study was done with 100 patients who were posted for cataract surgery. The patients were randomly divided into two groups of 50 patients each using compute
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Joshi, Purushottam, Raman Mehta, and Suma Ganesh. "Accuracy of intraocular lens power calculation in pediatric cataracts with less than a 20 mm axial length of the eye." Nepalese Journal of Ophthalmology 6, no. 1 (2014): 56–64. http://dx.doi.org/10.3126/nepjoph.v6i1.10773.

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Introduction: Selection of an appropriately-powered IOL is a complex issue, especially in eyes with an axial length of less than 20 mm in pediatric cataract. Objective: To assess the accuracy of IOL power calculation formulae in pediatric cataracts in eyes with an axial length of less than 20 mm. Materials and methods: The records of children less than 15 years old with congenital cataract who had undergone primary IOL implantation were analyzed. Main outcome measures: The variables studied were axial length, keratometric values and the prediction error. The data were analyzed for prediction e
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Barnwal, Nisha Kumari, Sanjay Kumar Sah, Bibek Chaudhary, Pankaj Ray Adhikari, and Rajiv Ranjan Karn. "Visual and keratometric outcomes following corneal collagen cross-linking in keratoconus: an experience from Nepal." Medical hypothesis, discovery & innovation in optometry 6, no. 1 (2025): 15–21. https://doi.org/10.51329/mehdioptometry217.

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Background: Keratoconus is a progressive corneal ectasia causing visual impairment, often initially managed using spectacles or rigid gas permeable contact lenses, which do not halt disease progression. Corneal collagen cross-linking (CXL) is the only treatment proven to stabilize the condition. Although its efficacy is well documented globally, data from Nepal are limited. This study evaluated visual and keratometric parameters before and after CXL in Nepali patients with varying severities of keratoconus. Methods: This retrospective, hospital-based study analyzed visual acuity and keratometr
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Adhikari, Pankaj Ray, Nirmala Chaudhary, and Rajiv Ranjan Karn. "Profile and Visual Outcome of Patients having Keratoconus Attending Tertiary Eye Hospital, Nepal." Journal of Nobel Medical College 13, no. 1 (2024): 35–39. http://dx.doi.org/10.3126/jonmc.v13i1.68100.

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Background: Keratoconus is a bilateral, asymmetric, chronic, progressive ectasia of the cornea in which patients experience distorted vision that is usually treated with rigid contact lenses when spectacles no longer provide adequate vision. The aim of the study is to find out the clinical profile and visual outcome of the patient having Keratoconus. Materials and Methods: The hospital based cross sectional study was done at Biratnagar Eye Hospital, Biratnagar. All the diagnosed Keratoconus patients referred from cornea clinic to contact lens clinic for contact lens trial were included in this
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Khanthik, Apisit, Ngamjit Kasetsuwan, Sasi Yaisawang, Usanee Reinprayoon, Vilavun Puangsricharern, and Vannarut Satitpitakul. "Factors predicting the visual outcome of intracorneal ring segment for keratoconus." PLOS ONE 19, no. 2 (2024): e0288181. http://dx.doi.org/10.1371/journal.pone.0288181.

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Objectives To identify predictive factors and to construct predictive models using epidemiological and clinical preoperative factors for the visual acuity change after intracorneal ring segment (ICRS) implantation in patients with keratoconus. Methods The medical records of 287 keratoconic eyes of 230 patients implanted with ICRS at Chula Refractive Surgery Center of a tertiary university hospital (Bangkok, Thailand) between January 2012 and March 2022 were retrospectively reviewed for epidemiological and clinical preoperative variables, including those derived from Scheimpflug tomography. Aft
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Ganesh, Sri, and Sheetal Brar. "Clinical Outcomes of Small Incision Lenticule Extraction with Accelerated Cross-Linking (ReLEx SMILE Xtra) in Patients with Thin Corneas and Borderline Topography." Journal of Ophthalmology 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/263412.

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Purpose. To study the safety and clinical outcomes of ReLEx SMILE with accelerated cross-linking in individuals with thinner corneas, borderline topography, and higher refractive errors.Methods. Eligible patients first underwent SMILE procedure for correction of myopic refractive error. Following the removal of lenticule, 0.25% riboflavin in saline was injected into the interface and allowed to diffuse for 60 seconds. Finally, eye was exposed to UV-A radiation of 45 mW/cm2for 75 seconds through the cap. Total energy delivered was 3.4 J/cm2.Results. 40 eyes of 20 patients with mean age of 26.75
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Abdulameer, Alyaa, Zainb Adel Hashim, and Marwa Abdulzahra. "Occurrence of Corneal Astigmatism in Cataract Patients before Cataract Removal." J Nat Sc Biol Med 16, no. 1 (2025): 218–21. https://doi.org/10.5281/zenodo.15477753.

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<strong>Introduction: </strong>Cataract extraction is a common surgery in the world; associated compiling conditions are common and impact the surgery outcome, including corneal astigmatism. This research deals with estimating how prevalent the occurrence of astigmatism is in Iraqi patients, since obtaining good visual outcomes is our goal with minimising visual imperfections which may occur primarily because of astigmatism, which really cannot be defeated during cataract surgery, since usual non-toric lenses don&rsquo;t treat it, and there are other simple ways to manipulate minor degrees of
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Harika Kollipara, Mathew Kurian, and Luci kaweri. "Clinical outcomes of Toric IoL long term follow up and predictors of clinical outcome." International Journal of Science and Research Archive 12, no. 2 (2024): 2920–28. http://dx.doi.org/10.30574/ijsra.2024.12.2.1485.

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Background: Cataract surgery is a common procedure, and correcting astigmatism during surgery is crucial for achieving spectacle independence. Approximately 20 -30% of cataract patients have significant corneal astigmatism. Toric intraocular lens (IOLs) will correct astigmatism by having different powers in different meridians and are designed to minimize postoperative rotation. Proper patient selection and precise placement are essential for success. Study aim and objectives: To study the long term outcomes of intraocular toric IOL implantation after an uneventful cataract surgery. The study
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Petrovic, Tiana, and Svetlana Stanojlovic. "Tomographic changes after corneal collagen cross-linking for progressive keratoconus - one-year follow-up study." Srpski arhiv za celokupno lekarstvo, no. 00 (2022): 62. http://dx.doi.org/10.2298/sarh200731062p.

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Introduction/Objective. The aim of this study was to evaluate outcome of corneal collagen cross-linking (CXL) in patients with progressive keratoconus. Methods. This retrospective single-centered interventional study included 52 eyes of 41 patients who underwent epithelium-off CXL procedure at the age &gt; 18 years. Corneal tomography data, uncorrected and best spectacle-corrected distant visual acuity (UDVA and CDVA, respectively) were analyzed at baseline and postoperatively over the initial 12 months period. In addition, the natural course of corneal tomographic changes were demonstrated at
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Choi, Young Joo, Gyu Le Han, Dong Hui Lim, and Tae-Young Chung. "Long-term Clinical Outcome of Refractive Corneal Inlays for Compensation of Presbyopia." Journal of the Korean Ophthalmological Society 64, no. 2 (2023): 90–98. http://dx.doi.org/10.3341/jkos.2023.64.2.90.

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Purpose: To study the long-term efficacy and safety of Flexivue Microlens refractive corneal inlays in Koreans for compensation of presbyopia.Methods: Flexivue Microlens inlays were implanted in nine eyes at Samsung Medical Center from October 2015 to February 2018. The follow-up period was 1.95 ± 0.6 years. Pre- and postoperative near/intermediate/distant visual acuity, spherical equivalent, contrast sensitivity, defocus curve, keratometry, and patient satisfaction were evaluated retrospectively.Results: The uncorrected near visual acuity (UNVA) of the operated eye increased significantly to
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Rajurkar, Dr Sagar, Sachin Agrawal, and Ravi Chauhan. "A Study of Anatomical and Visual Outcome in Secondary Scleral Fixated Intra-Ocular Lens Implantation." International Journal of Medical Science and Clinical Invention 8, no. 05 (2021): 5387–91. http://dx.doi.org/10.18535/ijmsci/v8i05.06.

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Abstract:&#x0D; Aims: To study of anatomical and visual outcome in secondary scleral fixated intra-ocular lens implantation&#x0D; Settings and Design: Hospital based prospective case study conducted at a tertiary care centre over a period of 2 years.&#x0D; Methods and Material: 30 eyes of 30 patients underwent secondary scleral fixation of IOL by 2-point Ab-externo technique. Post-operatively best corrected visual acuity, IOP, Keratometry and complications encountered were noted at regular follow-up of 7th day, 6 weeks, 3 months and 6 months.&#x0D; Results: Mean age of patients in the study wa
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Seena, A. C., Vijaya Lakshmi, and K. Husna Noufal. "The outcome of corneal collagen cross-linking in progressive keratoconus: A 24-month follow-up." Kerala Journal of Ophthalmology 35, no. 3 (2023): 272–77. http://dx.doi.org/10.4103/kjo.kjo_113_22.

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Purpose: The purpose of this study is to evaluate the effect of corneal collagen cross-linking on visual acuity and corneal parameters like keratometry and pachymetry. Methods: It was a retrospective, noncomparative, open-label study conducted at a tertiary eye care center. The eyes that underwent epithelium-off CXL (corneal collagen cross-linking) for progressive keratoconus between 2018 January and 2019 December, and who completed 24 months' post-CXL follow-up, were included in the study. Data regarding uncorrected and best spectacle-corrected visual acuity (UCVA and BSCVA) and corneal topog
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Putri, Rizqi, Dini Dharmawidhiarini, Azzahra Afifah, Farida Moenir, and Sahata P. H. Napitupulu. "VISUAL AND REFRACTIVE OUTCOME OF NEW GENERATION SMALL INCISION LENTICULE EXTRACTION (SMILE) IN MYOPIA AND MYOPIC ASTIGMATISM." Ophthalmologica Indonesiana 49, S1 (2024): 255–63. http://dx.doi.org/10.35749/acyjmc85.

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Introduction: Two main options for the surgical correction of high myopia and myopic astigmatism are corneal refractive surgery and implantation of phakic intraocular lens (IOL). Small Incision Lenticule Extraction (SMILE) is becoming more popular technique which includes a minimally invasive flap-free procedure. The aim of this study is to evaluate the visual and refractive outcome of New Generation SMILE in myopia and myopic astigmatism. Methods: This is an observational retrospective study in patients who underwent SMILE using Visumax 800 Femtosecond laser procedure at Undaan Eye Hospital i
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