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A trabeculectomy is a last resort method for treating chronic glaucoma. Chronic glaucoma is a condition whereby the eye fills up gradually with fluid, increasing pressure and damaging the optic nerve. Left unchecked, it can cause tunnel vision or even blindness.
Standard treatments for the condition are eye drops and injections to reduce the flow of aqueous fluid in the eyes. If these fail, glaucoma laser surgery may be performed. A trabeculectomy is generally only performed if all other treatments have failed.
Surgeons performing a trabeculectomy remove part of the eye in order to alleviate the build of pressure inside the eyeball. A small trapdoor is opened up in the sclera, while a corresponding segment of the iris is removed to prevent it from floating up and blocking the trapdoor. The trapdoor is then closed with microscopically fine stitching.
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