Trabeculectomy (Filtration Surgery) for Glaucoma
During trabeculectomy—sometimes also called filtration surgery—a piece of tissue in the Reference drainage angle Opens New Window of the eye is removed, creating an opening. The opening is partially covered with a flap of tissue from the sclera, the white part of the eye, and the conjunctiva, the clear thin covering over the sclera. This new opening allows fluid (Reference aqueous humor Opens New Window) to drain out of the eye, bypassing the clogged drainage channels of the Reference trabecular meshwork Opens New Window.
As the fluid flows through the new drainage opening, the tissue over the opening rises to form a little blister or bubble, called a bleb. The bleb is located where the sclera, or white of the eye, joins the iris, the colored part of the eye. During office visits after surgery, the doctor looks at the bleb to make sure that fluid is still draining out of the new opening. Not all blebs have to be easily seen to work.
|By:||Reference Healthwise Staff||Last Revised: February 28, 2012|
|Medical Review:||Reference Adam Husney, MD - Family Medicine
Reference Christopher J. Rudnisky, MD, MPH, FRCSC - Ophthalmology