PURPOSE:To enable accurate working and assembling by allowing a lens system consisting of the 1st lens having the 1st cylindrical surface and the 2nd spherical surface and the 2nd lens having the 3rd cylindrical surface and the 4th spherical surface from the light incidence side to satisfy ...
Meridional analysis for calculating the expected spherocylindrical refraction in eyes with toric intraocular lenses Purpose To present a method of calculating the expected spherocylindrical refraction after toric intraocular lens (IOL) implantation and to compare it with......
Toric lens design To correct astigmatism, a toric or spherocylindrical lens is used (Fig. 14-29). The lens must be stabilized so that it does not rotate on the eye. To accomplish this, the cylinder is ground on either the front or the back surface. Current methods available to prevent ...
To compare the efficacies in astigmatic correction of simultaneous femtosecond laser-assisted cataract surgery (FLACS) with intrastromal arcuate keratotomy (ISAK) versus toric intraocular lens (IOL) implantation with conventional phacoemulsification in moderate astigmatism. Methods A retrospective chart review ...
First, perform spherical over-refractions, but if they don’t produce a visually significant improvement, perform a sphero-cylindrical over-refraction (SCOR). A cross-cylinder calculation to determine the new lens power can be obtained using a website, app, or lab consultation. Final CL Rx: ...
This study develops a method to determine toricity ratios used by arbitrary toric intraocular lens calculators. Access to this information allows for the improvement of refractive results. We derive the Sayegh-Gabra formula, which uses input and output p
Combined 23-gauge microincisonal vitrectomy surgery and phacoemulsification with AcrySof toric intraocular lens implantation: a comparative study Eye (2011) 25, 1327–1332 & 2011 Macmillan Publishers Limited All rights reserved 0950-222X/11 www.nature.com/eye DH Park1, JP Shin1 and SY Kim2 ...
Purpose: To evaluate the refractive outcomes and intraocular stability of Acriva toric intraocular lens (T-IOL) (Acriva BB Toric UDM 611, VSY, Istanbul, Turkey) in patients with astigmatism of more than 1.50 diopters (D). Materials and Methods: In this prospective...
PURPOSE:To enable accurate working and assembling by allowing a lens system consisting of the 1st lens having the 1st cylindrical surface and the 2nd spherical surface and the 2nd lens having the 3rd cylindrical surface and the 4th spherical surface from the light incidence side to satisfy ...
Evaluating the effect of splitting cylindrical power on improving patient tolerance to toric lens misalignmentToricIntraocular lensesAstigmatismMisalignmentMisorientationEvaluating the impact of splitting toric power on patient tolerance to misorientation such as with intraocular lens rotation. University vision ...