目的探讨表面角膜镜片术对知觉性外斜视的影响，以评价其治疗作用。方法对１０例因单眼无晶体所致知觉性外斜视患者行表面角膜镜片术，并随访９个月～５年，分别观察手术前后视力、屈光状态、立体视觉及眼位。结果手术后１０例视力均提高，其中６例眼位恢复正常（≤±３），４例部分矫正。结论表面角膜镜片术可改善无晶体眼所致的知觉缺陷，恢复一定程度的双眼视觉，从而有利于知觉性外斜视的矫正。 Objective To investigate the effect of surface corneal ophthalmoscopy on epistemic exotropia to evaluate its therapeutic effect. Methods Ten patients with sensory exotropia due to monocular aphakia underwent surface corneal ophthalmoscopy and were followed up for 9 months to 5 years. Visual acuity, refractive status, stereopsis and ocular position were observed before and after operation. Results After operation, visual acuity was improved in 10 cases, of which 6 eyes returned to normal (≤ ± 3 ) and 4 patients were partially corrected. Conclusions Surface keratomileusis can ameliorate the perceptual defects caused by aphakia and restore a certain degree of binocular vision so as to facilitate the correction of perceptual exotropia.