Fig. 9From: Collagen matrix vs mitomycin-C in trabeculectomy and combined phacoemulsification and trabeculectomy: a randomized controlled trialKaplan-Meier curve demonstrating hypotony-free rates in the collagen matrix (CM) and mitomycin-C (MMC) groups using the intraocular pressure criterion ≤ 5 mmHg on two consecutive visits, starting at the 6-month visit. If IOP was ≤ 5 mmHg at the final study visit, the patient was classified as having met the definition of hypotony. The risk of hypotony was significantly higher in the MMC group (p = 0.002)Back to article page