[Skip to Content]
Access to paid content on this site is currently suspended due to excessive activity being detected from your IP address 54.161.155.6. Please contact the publisher to request reinstatement.
[Skip to Content Landing]
Article
October 1991

Photorefractive Keratectomy for AstigmatismInitial Clinical Results

Author Affiliations

From the Doheny Eye Institute and the Department of Ophthalmology, University of Southern California School of Medicine, Los Angeles (Drs McDonnell and Moreira) and VISX Inc, Sunnyvale, Calif (Messrs Clapham and D'Arcy and Dr Munnerlyn).

Arch Ophthalmol. 1991;109(10):1370-1373. doi:10.1001/archopht.1991.01080100050041
Abstract

• Excimer laser photorefractive keratectomy, developed to perform radially symmetric ablations to correct myopic or hyperopic refractive errors, was used to perform toric ablations designed to correct cylindrical errors. An expanding slit was used to flatten the cornea in the steep meridian. Four contact lens—intolerant patients underwent this procedure for correction of astigmatism (two patients after penetrating keratoplasty, one patient after corneal ulcer, and one patient with naturally occurring high astigmatism). In each patient, surgery reduced the regular component of the astigmatism; residual irregular astigmatism limited spectacle-corrected acuity in one patient. All patients experienced a shift in spherical equivalent toward hyperopia. Toric ablations with the excimer laser appear to represent a promising strategy for the correction of compound myopic astigmatism that does not rely on creation of deep corneal incisions, excisions, or compression sutures.

×