Figure 1

The Kaplan–Meier survival analysis demonstrates the overall survival rate after trabeculectomy (LEC). Surgical success was assessed based on postoperative IOPs as follows: (a) 6 ≤ IOP ≤ 21 and (b) 6 ≤ IOP ≤ 15, without additional glaucoma surgeries except for laser suture lysis, (c) 6 ≤ IOP ≤ 21 without additional glaucoma surgeries except for needling and laser suture lysis. Two consecutive deviations from the success criteria, loss of light perception, or additional glaucoma surgery were considered as failures in the Kaplan–Meier analysis. The overall survival rates after LEC were (a) 0.52 at 36 months, 0.42 at 60 months, and 0.25 at 84 months; (b) 0.49 at 36 months, 0.27 at 60 months, and 0.11 at 84 months; and (c) 0.76 at 36 months, 0.71 at 60 months, and 0.65 at 84 months after the operation, respectively.