part of has input surgical excision glaucoma filtration surgery cephalectomy trabeculectomy A surgical procedure aimed at lowering the intraocular pressure by producing an outflow of aqueous humour through a drainage passage created in the sclera between the anterior chamber and the subconjunctival space. 2020-06-23T20:12:12Z eye trabecular meshwork surgical removal http://orcid.org/0000-0001-7941-2961 The filtering procedure involves full thickness penetration of sclera to remove a small portion of the trabecular meshwork or surrounding tissue; it bypasses the natural outflow system by diverting aqueous humor from the anterior chamber into a subconjunctival reservoir with a filtering bleb on the eye. Antifibrotic agents, such as mitomycin-C and 5-fluorouracil, may be used intraoperatively and postoperatively to reduce scarring and prevent closure of the new channel. eye trabecular meshwork