نتایج جستجو برای: emmetropia

تعداد نتایج: 336  

2015
Sang-Yeob Kim Byeong-Yeon Moon Hyun Gug Cho

[Purpose] To assess the changes in falling risk depending on the induced axis direction of astigmatism using cylindrical lenses in a static posture. [Subjects and Methods] Twenty subjects (10 males, 10 females; mean age, 23.4 ± 2.70 years) fully corrected by subjective refraction participated. To induce myopic simple astigmatism conditions, cylindrical lenses of +0.50, +1.00, +1.50, +2.00, +3.0...

Journal: :American journal of ophthalmology 2003
Jose L Güell Mercedes Vázquez Francoise Malecaze Felicidad Manero Oscar Gris Fortino Velasco Helene Hulin Jaune Pujol

PURPOSE To evaluate efficacy, predictability, and safety of Artisan toric phakic intraocular lens (Ophtec, Groningen, The Netherlands) implantation for the correction of astigmatism higher than 2 diopters. DESIGN Interventional case series. METHODS This prospective study included 27 eyes of 16 patients with a mean preoperative spherical equivalent of -11.78 +/- 6.24 diopters and a mean preo...

Journal: :Survey of ophthalmology 1997
S M Carden

PURPOSE To test the hypothesis that rod-mediated visual thresholds at 10 degrees eccentricity are elevated in children with histories of mild retinopathy of prematurity (ROP). METHODS Dark-adapted thresholds for detection of 50 msec, 2 degrees diameter spots at a 10 degrees eccentric site, and at a peripheral reference site, 30 degrees eccentric, were measured in 20 children with a history of...

Journal: :Investigative ophthalmology & visual science 2004
Sanjeewa Wickremasinghe Paul J Foster Davaatseren Uranchimeg Pak Sang Lee Joe G Devereux Poul Helge Alsbirk David Machin Gordon J Johnson Jamyanjav Baasanhu

OBJECTIVE To describe the variation in ocular biometry and its association with refraction in adult Mongolians. METHODS The study included 1800 subjects, aged 40 years or more, who were selected in two Mongolian provinces-Hövsgöl and Omnögobi-to participate in this population survey. Axial length (AL) and its components, as well as noncycloplegic autorefraction and corneal power (CP), were me...

2001
Edward L. Raab

Purpose: To ascertain an examination interval that will not increase the risk of untimely detection of decompensation of accommodative esotropia whether or not initial nonoperative treatment must be supplemented. Methods: The records of 63 patients with controlled accommodative esotropia examined at 3to 6-month intervals were reviewed for age at first control, the occurrence of decompensation, ...

2017
Steven C Schallhorn Julie M Schallhorn Martina Pelouskova Jan A Venter Keith A Hettinger Stephen J Hannan David Teenan

PURPOSE To compare refractive and visual outcomes, patient satisfaction, and complication rates among different age categories of patients who underwent refractive lens exchange (RLE). METHODS A stratified, simple random sample of patients matched on preoperative sphere and cylinder was selected for four age categories: 45-49 years (group A), 50-54 years (group B), 55-59 years (group C), and ...

Journal: :Transactions of the American Ophthalmological Society 2005
Marguerite B McDonald

PURPOSE To evaluate the data on the safety, effectiveness, and stability of conductive keratoplasty (CK), a thermal, radiofrequency-based technique for treating 0.75 to 3.00 diopters (D) of spherical hyperopia. METHODS A prospective, consecutive series, multicenter clinical trial involving 400 hyperopic eyes was conducted by 19 surgeons at 12 centers. The treatment goal was emmetropia. Cohort...

2014
Blanco Domínguez

Acute corneal hydrops is a rare complication caused by a rupture in Descemet’s membrane as a result of progressive corneal thinning, normally due to advanced forms of corneal ectatic disorders.We report a case of unilateral pellucid marginal degeneration (PMD) which presented as acute corneal hydrops in a 56-year-old woman with no history of ocular or systemic disease. J Emmetropia 2014; 5: 43-...

Journal: :BMC Ophthalmology 2021

Abstract Background The purpose of this study was to evaluate the shape crystalline lens in terms biometry and diopters before after cycloplegia using CASIA2 swept-source (SS) optical coherence tomography (OCT) system on anterior segment. Methods This a retrospective study. Children adolescents (26 males 29 females, aged 4–21 years) with simple ametropia were selected for optometry imaging at 2...

Journal: :The British journal of ophthalmology 2016
Marcus Blum Kathrin Täubig Christin Gruhn Walter Sekundo Kathleen S Kunert

BACKGROUND To evaluate the 5-year results of Refractive Lenticule Extraction (ReLEx) as Small Incision Lenticule Extraction (SMILE) technique for treatment of myopia and myopic astigmatism. METHODS In 2008/2009, the worldwide first 91 eyes were treated using a novel surgical technique (SMILE), where a refractive lenticule of intrastromal corneal tissue is removed though a small incision compl...

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