Long-term results of photorefractive keratectomy for myopia and myopic astigmatism.

Abstract:

PURPOSE:To assess the long-term refractive outcomes of photorefractive keratectomy in myopia and myopic astigmatism. METHODS:A retrospective study of 120 photorefractive keratectomy operated eyes with at least four-year follow-up (maximum of 96 months, mean follow-up 55 months). We divided patients into group 1 (G1) spherical equivalent (SE) up to -4.00 diopters (D) and group 2 (G2) SE >-4.00 D. The Summit Apex Plus excimer laser was used for ablation. All eyes were analyzed in terms of uncorrected and best spectacle corrected visual acuity (UCVA/BSCVA) and cycloplegic refraction. Data were analyzed using the Refractive Surgery Consultant Elite database software. RESULTS:G1 with 85 eyes (49 patients) presented mean SE -2.42 D and G2 with 35 eyes (22 patients) and mean SE of -4.45 D. Ninety-four percent of eyes in G1 and 82.9% of G2 were within +/-1.00 D of emmetropia at 4 years. The UCVA was 20/30 or better in 82.0% of G1 eyes and 77.0% of G2 in the last postoperative follow-up. No patient lost more than one line in G2 compared to 13.0% in G1. Eyes that gained one or more lines after 4-year follow-up were 11.9% G1 and 2.9% in G2, respectively. A statistically significant positive correlation was found between achieved versus attempted refractive correction in both groups (r=0.925, p<0.0005). CONCLUSIONS:Photorefractive keratectomy was a safe and stable surgical procedure to correct myopic refractive errors, with no significant change in mean postoperative spherical equivalent refraction in the long-term follow-up.

journal_name

Arq Bras Oftalmol

authors

Yamazaki ES,Stillitano I,Wallau AD,Bottós JM,Campos M

doi

10.1590/s0004-27492007000600017

subject

Has Abstract

pub_date

2007-11-01 00:00:00

pages

975-80

issue

6

eissn

0004-2749

issn

1678-2925

pii

S0004-27492007000600017

journal_volume

70

pub_type

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