PURPOSE To retrospectively evaluate the effectiveness of paired, arcuate transverse keratotomy (Arc-T) performed prior to or after photorefractive keratectomy (PRK) to correct low to moderate amounts of natural or laser-induced astigmatism. METHODS Spherical PRK was performed in 730 eyes for myopia of -1.00 to -7.00 D. PRK with arcuate transverse keratotomy was performed in 150 of these eyes;...

purpose: to evaluate the visual outcomes of cross-cylinder ablation in laser in situ keratomileusis (lasik) for eyes with high astigmatic refractive errors and low spherical component. methods: we prospectively evaluated cross cylinder lasik in patients with high astigmatic refractive error but low spherical component over a period of 2 years. all procedures were performed with the nidek ec-500...

We have had 10 years of successful experience with asymmetric radial keratotomy in keratoconus, designed to flatten the steeper central and paracentral areas of the cornea. We think the procedure is the treatment of choice for types I, II, and selected cases of type III keratoconus. The procedure does not adversely affect the results of subsequent surgery such as aphakic epikeratoplasty, cornea...

PURPOSE To compare the effectiveness of toric foldable iris-fixated phakic intraocular lens (pIOL) implantation and non-toric foldable iris-fixated pIOL implantation with limbal relaxing incisions (LRIs) for correcting moderate-to-high astigmatism in myopic eyes. MATERIALS AND METHODS The medical records of 146 patients (195 eyes) with myopic astigmatism who underwent toric foldable iris-fixa...

PURPOSE It is not clear whether emmetropization is confined to spherical refractive errors, or whether astiqmatic errors are also corrected via visual feedback. Experimental results from the animal model of the chicken are equivocal since compensation of imposed astimatic defocus was found in some but not all studies. Astigmatism could only be compensated by changes in the geometry of the corne...

PURPOSE To evaluate the effect of epiblepharon surgery on visual acuity and with-the-rule astigmatism in children compared to patients without surgical treatment. METHODS We undertook a retrospective case control study and reviewed the charts of 202 eyes treated with epiblepharon surgery and of 142 eyes without surgery. The surgical procedure for epiblepharon correction used rotating suture t...

To the Editor: I read with interest the October editorial, “JRS Standard for Reporting Astigmatism Outcomes of Refractive Surgery”1 by Reinstein et al.; however, some clarification is required. I advocated common standards for reporting surgically induced astigmatism in 1997.2 In 2008, a comprehensive analysis of assessment methods and statistical analysis of surgically induced astigmatism was ...

PURPOSE To report a novel application of toric topographically customized transepithelial collagen cross-linking (CXL) aiming to achieve refractive astigmatic changes in a keratoconic cornea. METHODS Specially formulated riboflavin transepithelial administration and delivery of high-fluence UVA in a topographically customized pattern was applied in an eye with progressive keratoconus. Visual ...