We evaluated 44 patients totaling 64 eyes that had undergone photoastigmatic refractive keratectomy at Casey Eye Institute, Portland, Oregon for the correction of myopia and astigmatism. The mean entering manifest sphere was -4.11D, the mean cylinder was -1.54D. Forty-five eyes had with-the-rule astigmatism, fifteen had against-the- rule astigmatism, and four eyes had oblique astigmatism. The mean entering best corrected manifest visual acuity was 20/20+ 1. Patients with 6 months of follow-up care showed a mean sphere correction of +0.15D and a mean cylinder correction of -0.57D. The mean best corrected visual acuity was 20/20+ 1, and the mean uncorrected acuity was 20/20-2. These data show that there is a significant and accurate correction of myopic astigmatism with P.A.R.K., and that P.A.R.K. is an effective treatment for patients wanting to undergo vision correction surgery.
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