AIM: To evaluate the ocular surface in the patients after strabismus surgery.

METHODS: One hundred and eighty-eight hospitalized patients(240 eyes)with strabismus from May 2015 to October 2016 in Aier Hospital were divided into 3 groups according to the type of incision: 85 cases(100 eyes)with the corneal limbus incision in Group A; 35 cases(50 eyes)with the cross-muscle incision in Group B; 68 cases(90 eyes)with the adjacent-fornix incision(including Parks incisions and improved Parks incisions)in Group C. And 75 eyes with single extraoeular muscle surgery, 110 eyes with 2 extraoeular muscle surgery, 55 cases with 3 extraoeular muscle surgery. The first noninvasive tear film break-up time(NITBUTf)and the tear meniscus height(TMH)were tested by Oculus anterior segment analyzer preoperatively and 1d, 1, 2 and 4wk postoperatively. The data were studied by statistics.

RESULTS: Comparing with preoperative, TMH increased significantly at post-operatively 1d in all group, NIKBUTf reduced significantly(P<0.05). NIKBUTf was recovered in Group A at post-operative 2wk. NIKBUTf were recovered in Group B and C at post-operative 1wk. TMH were recovered in Group A and B at post-operative 2wk. TMH was recovered in Group C at post-operative 1wk. NIKBUTf and TMH were recovered with the single extraoeular muscle surgery at post-operative 1wk. They were recovered at post-operative 2wk with the 2 and 3 extraoeular muscle surgery.

CONCLUSION: Surgical incision and surgical muscle number may affect the ocular surface of the people after strabismus surgery. The adjacent fornix conjunctival incision has less effect. The less number of muscles in strabismus surgery, the less effect on ocular surface.