Results 31 to 40 of about 13,274 (216)

A retinoscopic survey of 333 horses and ponies in the UK [PDF]

open access: yes, 2014
Introduction: Ophthalmic examination in the horse is generally limited to crude assessment of vision and screening for ocular lesions. The refractive state of equine eyes and the potential impact on vision and performance requires further ...
Chung   +38 more
core   +1 more source

Impact of astigmatism and high-order aberrations on subjective best focus [PDF]

open access: yes, 2015
12 págs.; 9 figs.; 1 tab.© 2015 ARVO. We studied the role of native astigmatism and ocular aberrations on best-focus setting and its shift upon induction of astigmatism in 42 subjects (emmetropes, myopes, hyperopes, with-the-rule [WTR] and against-the ...
Dorronsoro, Carlos   +5 more
core   +1 more source

High Myopic Astigmatism [PDF]

open access: yesAmerican Journal of Ophthalmology, 1919
n ...
openaire   +1 more source

Photorefractive keratectomy for compound myopic astigmatism

open access: yesAmerican Journal of Ophthalmology, 2000
To evaluate the safety and efficacy of photorefractive keratectomy for the treatment of primary compound myopic astigmatism.In a prospective study, 93 eyes from 56 patients with a mean spherical equivalent of -4.98 +/- 1.80 diopters (range, -1.75 to -8.5) underwent photoastigmatic refractive keratectomy with the Summit Apex Plus excimer laser using ...
W W, Haw, E E, Manche
openaire   +2 more sources

Ocular residual astigmatism’s effect on high myopic astigmatism LASIK surgery [PDF]

open access: yesEye, 2014
To analyze the effect of ocular residual astigmatism (ORA) on the effectiveness of LASIK for treating high myopic astigmatism.This is an observational, cross-sectional study. We studied 116 consecutive myopic eyes with -3 diopters (D) or more of astigmatism that underwent LASIK surgery.
M A, Teus   +4 more
openaire   +2 more sources

Threshold Values of Myopic Anisometropia Causing Loss of Stereopsis

open access: yesJournal of Ophthalmology, 2019
Purpose. The aim of the study was to determine the threshold values of myopic anisometropia that lead to the loss of stereoacuity in most of patients. Materials and Methods. Forty healthy subjects were included in the study.
Maciej Gawęcki
doaj   +1 more source

LASIK for spherical refractive myopia: effect of topographic astigmatism (ocular residual astigmatism, ORA) on refractive outcome. [PDF]

open access: yesPLoS ONE, 2015
In eyes with a preoperative plano refractive cylinder, it would appear that there is no rationale for astigmatic treatment. The aim of this retrospective, cross-sectional data analysis was to determine the amount of topographic astigmatism in refractive ...
Andreas Frings   +6 more
doaj   +1 more source

Fifteen years follow-up of photorefractive keratectomy up to 10 D of myopia: outcomes and analysis of the refractive regression [PDF]

open access: yes, 2015
PURPOSE: To evaluate outcomes of photorefractive keratectomy up to -10.00 D of myopia and -4.50 of astigmatism and to develop a predictive model for the refractive changes in the long term.
ABBOUDA, ALESSANDRO   +3 more
core   +1 more source

Longitudinal Development of Refractive Error in Children With Accommodative Esotropia: Onset, Amblyopia, and Anisometropia. [PDF]

open access: yes, 2016
Purpose: We investigated longitudinal changes of refractive error in children with accommodative esotropia (ET) throughout the first 12 years of life, its dependence on age at onset of ET, and whether amblyopia or anisometropia are associated with ...
Birch, Eileen E.   +3 more
core   +1 more source

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