AIM: To observe the therapeutic effect of combined trabeculectomy with improved conjunctival incision at 1mm of corneoscleral limbus posterior

METHODS: A retrospective analysis of 171 cases(220 eyes)with primary glaucoma who were randomly divided into 3 groups according to the differences of conjunctival incision and the way of suture. Group A: 44 eyes of 33 cases underwent corneoscleral limbus conjunctival incision; Group B: 94 eyes of 76 cases underwent conjunctival incision at 1mm of corneoscleral limbus posterior; Group C: 82 eyes of 62 cases underwent conjunctival flap running suture based on group B. All cases were followed up for 1a. Intraocular pressure, morphology of filtering bleb, depth of anterior chamber and water leakage in conjunctival incision were observed and compared after operation among three groups.

RESULTS: The incidence of postoperative water leakage inconjunctival incision and shallow anterior chamber were group A >group B>group C and there were significant differences among the three groups(P<0.05), The success rate was 94.5%. The intraocular pressure and morphology of bleb had no significant differences among the three groups.

CONCLUSION:Conjunctival incision at 1mm of corneoscleral limbus posterior and conjunctival flap running suture can not only reduce the rate of water leakage in conjunctival incision and accelerate the speed of incision adhesion after operation, but also significantly enhance the therapeutic effect of combined trabeculectomy.