[Treatment of myopic anisometropia by radial keratotomy]

18 cases of myopic anisometropia were treated by radial keratotomy (RK). The preoperative myopia in eyes with higher degrees of refractive error ranged from -3.25 to -11.00D (mean = -6.53D), the anisometropia ranged from -2.50 to -11.00D (mean = 4.95D) and the visual acuities of the naked eyes were 0.02 to 0.15 (mean = 0.08). A half year after the operation, on the average, there was a 0.46 increase in visual acuity, -4.57 D decrease in myopia and -3.60D decrease in anisometropia. Postoperatively, 14 cases had regained the binocular single vision and 6 cases had 60" stereoscopic vision which is in the normal range. Therefore, it is considered that RK operation not only can decrease myopic degree and increase visual acuity, but also can decrease or even eliminate anisometropia to facilitate the recovery of binocular single vision. In monocular or anisometropic myopia, if the corrected visual acuity of the myopic eye or the eye with higher degree of myopia in a case is not below 0.6, RK operation is indicated and if the anisometropia is lower than -9.00D, postoperatively, binocular single vision may be recovered. The preoperative examination of myopic anisometropia, the method of predicting prognosis and some attention points in the treatment are also mentioned in the paper.