Purpose To compare corneal power and astigmatism in normal subjects obtained from dual Scheimpflug analyzer (Galilei), single Scheimpflug analyzer (Pentacam), optical low coherence reflectometer (Lenstar) and autokeratometer (AR) Methods Forty-eight eyes of 27 subjects were evaluated with 4 different ...
Eyes with prior LASIK or LASEK had similar contrast sensitivity to normal eyes in both photopic and mesopic conditions (all P > 0.05). However, the AULCSF difference was significantly higher in eyes with prior refractive surgery in automated CST examinations, while no significant difference ...
A lenticule center closer to the corneal vertex normal rather than the pupil center yielded better refractive outcomes in small incision lenticule extraction for myopia and myopic astigmatism, according to a study. The ...
Corneal astigmatismTo define a range of normality for the vectorial parameters Ocular Residual Astigmatism (ORA) and topography disparity (TD) and to evaluate their relationship with visual, refractive, anterior and posterior corneal curvature, pachymetric and corneal volume data in normal healthy eyes...
astigmatismPurpose To define a range of normality for the vectorial parameters Ocular Residual Astigmatism (ORA) and topography disparity (TD) and to evaluate their relationship with visual, refractive, anterior and posterior corneal curvature, pachymetric and corneal volume data in normal healthy eyes...
In eyes with a small amount of astigmatism, there was wider disagreement in axis location between the 2 devices. Both devices provided excellent repeatability and comparability of corneal powers and corneal astigmatism, suggesting they can be used interchangeably for measurement of these corneal ...
Corneal regular and irregular astigmatism assessed by Fourier analysis of videokeratography data in normal and pathologic eyes. 2004;111(4):752-757Tanabe T, Tomidokoro A, Samejima T, Miyata K, Sato M, Kaji Y, et al. Corneal regular and irregular astigmatism assessed by Fourier analysis of ...
Among the eyes tested in this study, eyes with keratoconus had the largest asymmetry, whereas eyes that had undergone PK had the most irregular corneas. The normal range was defined for the corneal irregular astigmatism index (asymmetry and higher order irregularity) to support future studies in ...