Comparison of Small Incision Trabeculectomy (Minitrab-clear Corneal) with Conventional Trabeculectomy in Primary Open Angle Glaucoma

Introduction: Primary open angle glaucoma is a symptom complex wherein there is damage to the optic nerve head with characteristic morphological and functional alterations in Optic Nerve Head (ONH). Aim: To compare the recent surgical approach minitrab with conventional trabeculectomy with reference to post-operative success. Materials and Methods: This prospective study was done in Theni Medical College Hospital, Theni, during the period of October 2015 to April 2016 in 40 eyes of 38 patients. Results: Age of both groups were almost the same. The most common age group in both groups was 51-60 years. Sex distribution was equal. 65% were males and 35% were females. A mean pre-operative intraocular pressure (IOP) in minitrab was 28.4 and in conventional trabeculectomy was 31.8. Success rate was equal in both groups (85%). The mean reduction in IOP in mini-trabeculectomy was 15.4 and in conventional was 17.2 mm of Hg. Bleb characteristics in minitrab the bleb was diffuse and low-lying while in conventional bleb was with microcysts, vascularized, overhanging, and few diffuse bleb. Change in K reading was not significant in mini-trabeculectomy compared to conventional. Conclusion: Post-operative IOP control in mini-trabeculectomy cases were equivalent to conventional trabeculectomy.