The only curative treatment for cataract is removal of the lens, although mydriatics may be helpful in the early stages. (Linton, 032019, p. 1175), Glaucoma >>A trabeculectomy is one of several surgical procedures that create a channel to allow aqueous humor to drain under the conjunctiva. If this procedure is not effective, cyclocryotherapy may be done. A cold probe, called a cryoprobe, is used to freeze part of the ciliary body. Freezing destroys some of the tissue, resulting in decreased production of aqueous humor. Therefore angle-closure glaucoma is considered a medical emergency. Unlike open-angle glaucoma, angle-closure glaucoma causes sudden, acute pain. Other signs and symptoms are blurred vision, halos around lights, nausea and vomiting, and headache on the affected side.