Abstract: In order to compare the effect of radial keratotomy with identical depth incisions and that with two depths incisions, 29 cases (39 eyes) with centripetal incisions were divided into two groups. The groups were operated with identical depth incisions or two depths incisions respectively. The results were dealt with F test. The equal spherical descended (4.7±0.7)D and the corneal refraction descended (4.5±0.8)D two years after surgery with identical depth incisions. To the surgery with two depth incisions , the equal spherical descended (5.0±1.2)D and the corneal refractive descended (4.4±1.3)D. There was no significant difference between the two groups(P>0.05). The surgical effect of redeepened incisions was same as that of identical depth incisions.

Key words: radial keratotomy, the depth of incisions, effect