Factors associated with the outcome of ab interno trabeculectomy

Purpose: To report factors that may influence the outcome of ab interno trabeculectomy using Trabecutome Cases and Method: This retropective study was made on 68 eyes of 56 patients who received surgery in the past 18 months and who were followed up for 6 months or longer. The series comprised 41 males and 27 females. The age averaged 71 months. The series included 17 eyes of primary open-angle glaucoma, 48 eyes with capsular glaucoma, and 3 eyes with secondary glaucoma. As potential factors that affect the outcome of surgery, we evaluated age, sex, central corneal thickness, intraocular pressure (IOP) before surgery, type of glaucoma, history of glaucoma surgery, and type of surgery. Results: IOP averaged 23.4 ± 6.8 mmHg before surgery and 13.7 ± 3.8 mmHg 6 months after surgery. The difference was significant (p<0.001). Surgery was evaluated as success in 75.0% after 6 months Rate of IOP decrease was significantly higher in eyes receiving simultaneous cataract surgery (p = 0.041), and was negatively correlated with the central corneal thickness. Conclusion: Glaucoma surgery using Trabecutome^® was more effective in eyes with lesser central corneal thickness and in eyes receiving simultaneous cataract surgery.