التفاصيل البيبلوغرافية
| العنوان: |
Results of the Prospective Evaluation of Radial Keratotomy (PERK) Study 4 years after surgery for myopia. Perk Study Group. |
| المؤلفون: |
Waring, G O 3rd, Lynn, M J, Fielding, B, Asbell, P A, Balyeat, H D, Cohen, E A, Culbertson, W, Doughman, D J, Fecko, P, McDonald, M B |
| المصدر: |
JAMA: Journal of the American Medical Association; 2/23/90, Vol. 263 Issue 8, p1083-1091, 9p |
| مستخلص: |
The Prospective Evaluation of Radial Keratotomy Study is a nine-center clinical trial of a surgical technique to reduce simple myopia by making incisions in the cornea. There were 435 patients (one eye per patient is reported) enrolled in the study with a 91% follow-up rate at 4 years after surgery. After surgery, uncorrected visual acuity was 20/40 or better in 76% of eyes. Fifty-five percent of the eyes had a refractive error within +/- 1.00 diopter; 28% were undercorrected, and 17% were overcorrected by more than 1.00 D. The width of the prediction 90% interval for the refractive change was 4.42 D, indicating a lack of predictability. The refractive error was not stable in some eyes; between 6 months and 4 years after surgery, 23% of eyes had a continued effect of the surgery of more than 1.00 D. For 323 patients with both eyes operated on, 64% stated they wore no optical correction. There were few serious complications. Eleven eyes (3%) lost two or three lines of best corrected visual acuity. Two eyes developed delayed bacterial keratitis without significant loss in best corrected visual acuity. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
