Trabeculectomy is performed as a treatment for glaucoma to lower the intraocular pressure (IOP). Mitomycin C (MMC) is an antimetabolite used during the initial stages of a trabeculectomy to prevent excessive postoperative scarring and thus reduce the risk of failure.
Wilkins, M., Indar, A., & Wormald, R. (2005). Intraoperative Mitomycin C for glaucoma surgery. Cochrane Database of Systematic Reviews. https://doi.org/10.1002/14651858.cd002897.pub2