[Analysis of refractive state after excimer laser photorefractive keratectomy in myopia].
OBJECTIVE
To evaluate refractive state after excimer laser photorefractive keratectomy (PRK) in patients with myopia.


METHODS
234 cases(391 eyes) followed up for two years were divided into two groups, group I: mild and moderate myopia(< or = -6.00 D), 228 eyes; group II: High myopia(> -6.00 D), 163 eyes. The refractive state of patients at three, six, twelve and twenty-four months postoperatively were monitored.


RESULTS
At two years after photorefractive keratectomy (PRK), refractive regression (> -0.5 D), overcorrection(> 1.00 D), undercorrection(> 1.00 D), postoperative residual astigmatism postoperative astigmatism and hyperopia shift in group I were 1.7%, 4.4%, 5.7%, 12.8%, 7.4% and 7.5% respectively, while in high myopia group were 15.9%, 4.9%, 23.3%, 29.7%, 31.1% and 6.7% respectively.


CONCLUSIONS
The results prove that photorefractive keratectomy is an effective, precise, stable and safe method for correction of mild and moderate myopia, but insufficient for high myopia.
Liu
S
S
Ophthalmic Laser Center, Xiangya Hospital, HuNan Medical University, Changsha 410078, China.
Wu
X
X
Wang
P
P
Huang
P
P
Xia
X
X
Tan
X
X
Mei
E
E
Hu
S
S
D000293:Adolescent; D000328:Adult; D001251:Astigmatism / Q000209:etiology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D054018:Lasers, Excimer; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000601:surgery*; D018903:Photorefractive Keratectomy / Q000009:adverse effects*; D014792:Visual Acuity