[Analysis of the therapeutic effect of radial keratotomy]

666 cases (1,302 eyes) of myopia were performed radial keratotomy and 738 eyes were followed up for 6-9 months. Before surgery, the mean spherical refraction was -6.65D and the mean keratometry was 44.17D with uncorrected visual acuity of 0.03-0.4. 6-9 months after operation, the mean spherical refraction decreased by 4.76D, or an average decrement of 2.69D for mild myopia, 4.07D for moderate myopia, 5.28D for high myopia, and 6.00D for very high myopia. The percentages of eyes with postoperative uncorrected visual acuity > or = 0.5 were 100%, 84.86%, 58.01% and 20.59% for mild, moderate, high and very high myopia respectively, and the corresponding figures for postoperative uncorrected visual acuity > or = 1.0 were 89.29%, 55.71%, 17.79% and 3.92% respectively. Complications were few.