Results 181 to 190 of about 108,431 (221)
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Relations between refractive astigmatism and corneal astigmatism
Acta Ophthalmologica, 2010Abstract Purpose To investigate the relationship between refractive astigmatism and corneal (anterior and posterior) astigmatism in normal eyes. Methods We prospectively recorded refractive astigmatism and corneal astigmatism (Orbscan) of 500 healthy eyes (including ametropia) of 250 patients. Astigmatism data was analyzed using polar values (cylinder,
O TOUZEAU +5 more
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Posterior Corneal Surface Toricity and Total Corneal Astigmatism
Optometry and Vision Science, 1991ABSTRACT: The influence of posterior corneal surface toricity upon total corneal astigmatism was investigated in 60 young subjects (mean age 22.04 ± 3.24 years). Both surfaces were found to be flatter horizontally than vertically.
M C, Dunne, J M, Royston, D A, Barnes
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Customized ablation for asymmetrical corneal astigmatism
Journal of Cataract and Refractive Surgery, 2001To evaluate laser in situ keratomileusis (LASIK) cases in which a customized ablation assisted by corneal topography was performed.Instituto de la Visión, Buenos Aires, Argentina.The study group comprised 23 cases with asymmetrical corneas; 17 had myopia and 6, hyperopia.
C, Argento, M J, Cosentino
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Corneal astigmatism after cataract surgery
Documenta Ophthalmologica, 1989206 Consecutive cataract patients were at random divided into three groups according to the way the cataract incision was closed: virgin silk 8-0, interrupted nylon 9-0, and double running nylon 9-0. The nylon, whether interrupted or continuous, yielded in the majority of cases a postoperative astigmatism with the rule, whereas virgin silk caused in ...
N W, Dekkers, J, Buijs
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Astigmatism and Corneal Curvature
Journal of Refractive Surgery, 1996J, Colin, R, Cottereau
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[The analysis of the axises of corneal astigmatism and total astigmatism in astigmatic patients].
Yan ke xue bao = Eye science, 2004The axial amount and the relationship between the axises of corneal astigmatism and total astigmatism were statistically analyzed in ametropic patients, for the purpose of selecting the refractive correction, the base curve of contact lens, the axis of astigmatic contact lens, and providing the reference of operational amount of ecimer laser ...
Z, Dai, R, Yu, X, Gong, S, Wang
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CHANGES IN CORNEAL ASTIGMATISM
American journal of optometry and archives of American Academy of Optometry, 1952openaire +2 more sources
Corneal power and astigmatism.
Annals of ophthalmology, 1986A study investigating the corneal power and degree of astigmatism in 520 patients at a university optometry clinic in Benin-City, Nigeria was undertaken. The mean low corneal power and the mean high corneal power were 42.7 +/- 1.5 diopters and 43.3 +/- 1.5 diopters, respectively. The mean corneal astigmatism was 0.61 +/- 0.63 diopters.
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