Trabeculectomy is a surgical operation which lowers the intraocular pressure inside the eye (IOP) in patients with glaucoma. ... By draining aqueous humour the trabeculectomy operation reduces the pressure on the optic nerve and prevents or slows further damage and further loss of vision in glaucoma.
Success Rate
In those reports, it shows that in older patients, glaucoma filtering surgery is successful in about 70-90% of cases, for at least one year. Occasionally, the surgically-created drainage hole begins to close and the pressure rises again.
How long does glaucoma surgery take?
Glaucoma surgery attempts to lower the eye pressure by various methods. These methods will be clearly described in the following sections. Regardless of the method used, it must be clear to patients that it takes on average 3 to 6 weeks to recover from surgery.