方法：对73例小度数(斜视度-15～-30PD)基本型间歇性外斜视住院患者进行回顾性分析，所选病例分为A，B 两组，A 组行单眼外直肌后退术，B 组行单眼小量外直肌后退联合小量内直肌缩短术。术后随访6mo，对两组的眼位，双眼单视功能(同时视、融合功能、远近立体视功能)分别进行观察和分析，比较两组术后正位率、双眼单视功能恢复率、欠矫及过矫发生率； 比较年龄与双眼单视功能恢复率间的关系。

结果：术后随访6mo，眼位正位率，B组明显高于A组，两组间差异具有统计学意义(P<0.05)； 术后随访6mo，双眼同时视：两组同时视功能均基本恢复，两组之间差异无统计学意义(P>0.05)； 术后随访6mo，双眼融合功能，远、近立体视功能恢复率B组均明显高于A组，两组间差异均具有统计学意义(P<0.05)； 术后随访6mo，年龄与双眼单视功能恢复率间差异：4～12岁组双眼融合功能，远、近立体视功能恢复率高于13～30岁组，两年龄组间差异具有统计学意义(P<0.05)。

结论：采用单眼小量外直肌后退联合小量内直肌缩短术治疗小度数基本型间歇性外斜视，术后眼位正位率、双眼单视功能恢复率均优于单眼外直肌后退术； 早期手术更有利于双眼单视功能恢复。

METHODS: The 73 cases of small strabismus degree(strabismus degree in -15～-30PD)of basic intermittent exotropia hospitalized patients were analyzed retrospectively. The selected cases are divided into A, B groups: Group A underwent unilateral lateral rectus recession surgery; Group B unilateral small lateral rectus recession combines with small medial rectus shortening surgery. Eyes position, the same time visual, fusion visual, far and near stereoscopic visual postoperative follow-up 6 months were observed and analyzed in both groups.Compare postoperative eyes position anteroposterior rate, undercorrection rate and overcorrection rate; Compare binocular vision recovery rate, undercorrection rate and overcorrection rate. Compare relationships between age and binocular vision recovery rate.

RESULTS: Postoperative anteroposterior ratio of eye position follow-up 6 months: group B was significantly higher than that of group A and difference between the two groups is statistically significance. Postoperative follow-up 6 months binocular fusion function, far and near stereoscopic visual function recovery rate, group B was significantly higher than that of group A and difference between the two groups is statistically significance(P<0.05); Postoperative follow-up 6 months age and single eyes visual function recovery rate: binocular fusion function, far and near stereoscopic visual function recovery rate, 4-12 years old group are higher than 13-30 years old group, difference between the two age groups is statistically significance(P<0.05).

CONCLUSION: Using unilateral small lateral rectus recession combines with small medial rectus shortening surgery curative effect for the treatment of small strabismus degree of intermittent exotropia. Postoperative anteroposterior ratio eye position, binocular single visual function recovery rate are better than unilateral lateral rectus recession surgery; Early surgery is more advantageous to the binocular visual function recovery.