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https://www.readbyqxmd.com/read/28917405/comparison-of-refractive-and-keratometric-astigmatism-after-microincision-cataract%C3%A2-surgery
#1
Atsushi Kawahara, Yoshinori Takayanagi
PURPOSE: To measure the correlation between refractive and keratometric astigmatism after microincision cataract surgery (MICS). SETTING: Takayanagi Clinic, Kushiro, Hokkaido, Japan. DESIGN: Retrospective case series. METHODS: This study evaluated patients having phacoemulsification and intraocular lens implantation through a 2.0 mm temporal clear corneal incision. Refractive astigmatism and keratometric astigmatism were described by Jackson cross-cylinder with-the-rule (J0) and oblique (J45) components and compared using linear regression analysis...
August 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28915799/analysis-of-various-factors-affecting-pupil-size-in-patients-with-glaucoma
#2
Ji Woong Park, Bong Hui Kang, Ji Won Kwon, Kyong Jin Cho
BACKGROUND: Pupil size is an important factor in predicting post-operative satisfaction. We assessed the correlation between pupil size, measured by Humphrey static perimetry, and various affecting factors in patients with glaucoma. METHODS: In total, 825 eyes of 415 patients were evaluated retrospectively. Pupil size was measured with Humphrey static perimetry. Comparisons of pupil size according to the presence of glaucoma were evaluated, as were correlations between pupil size and various factors, including age, logMAR best corrected visual acuity (BCVA), retinal nerve fiber layer (RNFL) thickness, spherical equivalent, intraocular pressure, axial length, central corneal thickness, white-to-white, and the kappa angle...
September 16, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28913996/intraocular-lens-power-calculation-after-refractive-surgery-a-comparative-analysis-of-accuracy-and-predictability
#3
Byeong Soo Kang, Jeong Mo Han, Joo Youn Oh, Mee Kum Kim, Won Ryang Wee
PURPOSE: To compare the accuracy of intraocular lens (IOL) power calculation using conventional regression formulae or the American Society of Cataract and Refractive Surgery (ASCRS) IOL power calculator for previous corneal refractive surgery. METHODS: We retrospectively reviewed 96 eyes from 68 patients that had undergone cataract surgery after keratorefractive surgeries. We calculated the formula with two approaches: IOL powers using the ASCRS IOL power calculator and IOL powers using conventional formulae with previous refractive data (Camellin, Jarade, Savini, and clinical history method) or without prior data (0, 2 and, 4 mm total mean power in topography, Wang-Koch-Maloney, Shammas, Seitz, and Maloney)...
June 29, 2017: Korean Journal of Ophthalmology: KJO
https://www.readbyqxmd.com/read/28913509/effects-of-single-segment-intacs-implantation-on-visual-acuity-and-corneal-topographic-indices-of-keratoconus
#4
Kazem Amanzadeh, Roghiyeh Elham, Ebrahim Jafarzadepur
PURPOSE: To assess the changes in visual acuity and topographic indices after implantation of single-segment Intacs. METHODS: Forty-two keratoconic eyes received Femtosecond-assisted single-segment Intacs. Uncorrected distance visual acuity (UDVA) and best spectacle corrected visual acuity (BSCVA), refractive error, keratometry (K1, K2, Km, and KMax.), and seven Pentacam measured topographical indices; index of surface variance (ISV), index of vertical asymmetry (IVA), keratoconus index (KI), central keratoconus index (CKI), index of height asymmetry (IHA), index of height decentration (IHD), and minimum radius of curvature (R Min) were assessed 4 months after surgery...
September 2017: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/28913504/a-review-and-meta-analysis-of-corneal-cross-linking-for-post-laser-vision-correction-ectasia
#5
REVIEW
Qi Wan, Dan Wang, HongQuan Ye, Jing Tang, Yu Han
PURPOSE: The aim of this study was to review the safety and stability of cornea cross-linking (CXL) for the treatment of keratectasia after Excimer Laser Refractive Surgery. METHODS: Eligible studies were identified by systematically searching PubMed, Embase, Web of Science and reference lists. Meta-analysis was performed using Stata 12.1 software. The primary outcome parameters included the changes of corrected distant visual acuity (CDVA), uncorrected visual acuity (UCVA), the maximum keratometry value (Kmax) and minimum keratometry value (Kmin), the surface regularity index (SRI), the surface asymmetry index (SAI), the keratoconus prediction index (KPI), corneal thickness, and endothelial cell count...
September 2017: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/28905828/influence-of-laser-versus-lens-sparing-vitrectomy-on-myopia-in-children-with-retinopathy-of-prematurity
#6
Sumita Agarkar, Roshani Desai, Sumeer Singh, Durgasri Jaisankar, Pramod Bhende, Rajiv Raman
PURPOSE: The purpose of this study is to compare the refractive error outcomes in the eyes of premature babies with retinopathy of prematurity (ROP) who underwent laser plus lens-sparing vitrectomy (LSV) in one eye and laser alone in the fellow eye. METHODS: This is a retrospective study. Fourteen babies with Stage 4A of ROP or worse who underwent laser plus LSV in one eye (Group 1) and laser alone in the fellow eye (Group 2) were followed at 2 months, 6 months, 1 year, one and a half year, and 2 years...
September 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28905823/refractive-outcomes-of-intraoperative-wavefront-aberrometry-versus-optical-biometry-alone-for-intraocular-lens-power-calculation
#7
Zina Zhang, Logan William Thomas, Szu-Yen Leu, Steven Carter, Sumit Garg
PURPOSE: To compare the outcomes of intraoperative wavefront aberrometry versus optical biometry alone for intraocular lens (IOL) power calculation in eyes undergoing cataract surgery with monofocal IOL implantation. METHODS: Preoperative data were obtained with the IOLMaster. Intraoperative aphakic measurements and IOL power calculations were obtained in some patients with the optiwave refractive analysis (ORA) system. Analysis was performed to determine the accuracy of monofocal IOL power prediction and postoperative manifest refraction at 1 month of the ORA versus IOLMaster...
September 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28891727/methodology-of-the-zoc-bhvi-high-myopia-cohort-study-the-onset-and-progression-of-myopic-pathologies-and-associated-risk-factors-in-highly-myopic-chinese
#8
Yanxian Chen, Ou Xiao, Xinxing Guo, Decai Wang, Padmaja Sankaridurg, Ian Morgan, Mingguang He
PURPOSE: The increasing prevalence of high myopia and its associated pathologies has raised challenges to ophthalmic services. This project aims to explore the onset and progression of myopic pathologies in highly myopic eyes through a prospective research cohort established in South China. METHODS: Patients with high myopia (sphere ≤ -6.00 D) visiting the optometric clinic of Zhongshan Ophthalmic Center (ZOC) were invited to participate in the baseline examinations and follow-up visit over a 10-year period...
September 11, 2017: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/28887114/ajo-centennial-cataract-surgery-from-1918-to-the-present-and-future-just-imagine
#9
Randall J Olson
PURPOSE: To review the history of cataract surgery over the past 100 years, and to offer predictions about new developments that may occur during the next 50 years. DESIGN: Interpretive essay. METHODS: Review of historical literature and author experiences pertaining to cataract surgery, with commentary and perspective. RESULTS: By this time, cataract surgery has advanced to the point that Kelman's introduction of phacoemulsification and use of intraocular lenses (IOLs), both very controversial when initially introduced, have become state of the art...
September 5, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28886257/prevalence-and-causes-of-visual-impairment-in-fundong-district-north-west-cameroon-results-of-a-population-based-survey
#10
Joseph Oye, Islay Mactaggart, Sarah Polack, Elena Schmidt, Violet Tamo, Marvice Okwen, Hannah Kuper
PURPOSE: To estimate the prevalence and causes of visual impairment in Fundong Health District, North West Cameroon. METHODS: A total of 51 clusters of 80 people (all ages) were sampled with probability proportionate to size and compact segment sampling. Visual acuity (VA) was measured with a tumbling "E" chart. An ophthalmic nurse examined people with VA<6/18 in either eye. The presence of hearing and physical impairments were assessed using clinical examination, and self-reported visual problems using the Washington Group Short Set...
September 8, 2017: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/28885667/variations-in-retinal-nerve-fiber-layer-measurements-on-optical-coherence-tomography-after-implantation-of-trifocal-intraocular-lens
#11
Javier García-Bella, José M Martínez de la Casa, Paula Talavero González, José I Fernández-Vigo Escribano, Laura Valcarce Rial, Julián García-Feijóo
PURPOSE: To establish the changes produced after implantation of a trifocal intraocular lens (IOL) on retinal nerve fiber layer measurements performed with Fourier-domain optical coherence tomography (OCT). METHODS: This prospective study included 100 eyes of 50 patients with bilateral cataract in surgical range, no other associated ocular involvement, refractive errors between +5 and -5 spherical diopters, and less than 1.5 D of corneal astigmatism. The eyes were operated by phacoemulsification with implantation of 2 different trifocal IOLs (FineVision and AT LISA tri 839MP) in randomized equal groups...
September 5, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28885242/the-use-of-femtosecond-laser-in-refractive-and-cataract-surgery
#12
Natalie Homer, Ula V Jurkunas
No abstract text is available yet for this article.
2017: International Ophthalmology Clinics
https://www.readbyqxmd.com/read/28882754/mini-review-far-peripheral-vision
#13
Michael J Simpson
The region of far peripheral vision, beyond 60 degrees of visual angle, is important to the evaluation of peripheral dark shadows (negative dysphotopsia) seen by some intraocular lens (IOL) patients. Theoretical calculations show that the limited diameter of an IOL affects ray paths at large angles, leading to a dimming of the main image for small pupils, and to peripheral illumination by light bypassing the IOL for larger pupils. These effects are rarely bothersome, and cataract surgery is highly successful, but there is a need to improve the characterization of far peripheral vision, for both pseudophakic and phakic eyes...
September 9, 2017: Vision Research
https://www.readbyqxmd.com/read/28880334/a-multicenter-retrospective-survey-of-refractive-surgery-in-78-248-eyes
#14
Kazutaka Kamiya, Akihito Igarashi, Ken Hayashi, Kazuno Negishi, Masaki Sato, Hiroko Bissen-Miyajima
PURPOSE: To retrospectively evaluate the current practice, trends, and outcomes of refractive surgery in Japan. METHODS: This multicenter survey comprised 78,248 eyes of 39,727 consecutive patients who underwent refractive surgery at 45 major institutions in Japan. The corresponding ophthalmologists responded to a selfadministered questionnaire. The authors especially evaluated the safety, efficacy, predictability, stability, and adverse events of LASIK and phakic intraocular lens (IOL) implantation 3 months postoperatively...
September 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28880333/predicting-refractive-surgery-outcome-machine-learning-approach-with-big-data
#15
Asaf Achiron, Zvi Gur, Uri Aviv, Assaf Hilely, Michael Mimouni, Lily Karmona, Lior Rokach, Igor Kaiserman
PURPOSE: To develop a decision forest for prediction of laser refractive surgery outcome. METHODS: Data from consecutive cases of patients who underwent LASIK or photorefractive surgeries during a 12-year period in a single center were assembled into a single dataset. Training of machine-learning classifiers and testing were performed with a statistical classifier algorithm. The decision forest was created by feature vectors extracted from 17,592 cases and 38 clinical parameters for each patient...
September 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28875960/analysis-of-macular-and-retinal-nerve-fiber-layer-thickness-in-children-with-refractory-amblyopia-after-femtosecond-laser-assisted-laser-in-situ-keratomileusis-a-retrospective-study
#16
Peng-Fei Zhao, Yue-Hua Zhou, Jing Zhang, Wen-Bin Wei
Background: Localized macular edema and retinal nerve fiber layer (RNFL) thinning have been reported shortly after laser in situ keratomileusis (LASIK) in adults. However, it is still unclear how LASIK affects the retina of children. This study aimed to investigate the macular retina and RNFL thickness in children with refractive amblyopia who underwent femtosecond laser-assisted LASIK (FS-LASIK). Methods: In this study, we included 56 eyes of 32 patients with refractive amblyopia who underwent FS-LASIK in our hospital from January 2012 to December 2016...
September 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28870179/the-quality-of-systematic-reviews-about-interventions-for-refractive-error-can-be-improved-a-review-of-systematic-reviews
#17
Evan Mayo-Wilson, Sueko Matsumura Ng, Roy S Chuck, Tianjing Li
BACKGROUND: Systematic reviews should inform American Academy of Ophthalmology (AAO) Preferred Practice Pattern® (PPP) guidelines. The quality of systematic reviews related to the forthcoming Preferred Practice Pattern® guideline (PPP) Refractive Errors & Refractive Surgery is unknown. We sought to identify reliable systematic reviews to assist the AAO Refractive Errors & Refractive Surgery PPP. METHODS: Systematic reviews were eligible if they evaluated the effectiveness or safety of interventions included in the 2012 PPP Refractive Errors & Refractive Surgery...
September 5, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28860703/refractive-changes-after-lens-sparing-vitrectomy-for-macular-hole-and-epiretinal-membrane
#18
Tetsuya Muto, Tomoharu Nishimura, Takefumi Yamaguchi, Makoto Chikuda, Shigeki Machida
PURPOSE: Cataract progression after lens-sparing vitrectomy might differ according to original posterior segment diseases. Our objective was to analyze the refractive values after lens-sparing vitrectomy for macular hole (MH) and epiretinal membrane (ERM). MATERIALS AND METHODS: We reviewed the medical records of 25 MH patients (25 eyes) and 23 ERM patients (23 eyes) who underwent lens-sparing vitrectomy. Refractive changes in both groups were compared. All patients underwent 20-gauge three-port pars plana vitrectomy...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28859157/pseudophakic-retinal-detachment-in-young-aged-patients
#19
Thomas Laube, Claudia Brockmann, Nils Lehmann, Norbert Bornfeld
OBJECTIVE: To investigate the incidence and risk factors for retinal detachment (RD) after cataract surgery or refractive lens exchange (RLE) in patients aged below 61 years. METHODS: Retrospective medical chart review of 7,886 patients (13,925 eyes) who underwent cataract surgery or RLE. Patients aged below 61 years were selected. Age, gender, axial length, follow-up times, and the occurrence of RD were recorded. Additional characteristics documented for RD cases were: history of RD, preexisting retinal findings, laser capsulotomy, status of macula at RD, date and details of RD...
2017: PloS One
https://www.readbyqxmd.com/read/28857438/spectacle-use-after-routine-cataract-surgery-a-study-from-the-swedish-national-cataract-register
#20
Daniel B Farhoudi, Anders Behndig, Per Montan, Mats Lundström, Charlotta Zetterström, Maria Kugelberg
PURPOSE: To explore patients' obtaining and use of spectacles after routine cataract surgery. METHODS: The study included 1329 patients who underwent bilateral surgery with the second eye operated during March 2013 at 38 different clinics in Sweden. Five months after the second-eye surgery, patients completed a five-item questionnaire about their spectacle use preoperatively and postoperatively. The responses were linked to data from the registry on multiple variables including postoperative refraction, age and gender...
August 31, 2017: Acta Ophthalmologica
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