What is the purpose of tube-shunt surgery?

Tube-shunt surgery, also known as a glaucoma shunt or trabeculectomy, is a surgical procedure performed to treat glaucoma, a condition characterized by increased pressure within the eye. The purpose of tube-shunt surgery is to create an alternative pathway for the aqueous humor, the clear fluid that fills the anterior chamber of the eye, to drain out of the eye, thereby reducing the intraocular pressure (IOP).

During the procedure, a small tube or shunt with a valve mechanism is surgically implanted into the eye. This tube allows the aqueous humor to flow from the anterior chamber to a small reservoir or bleb created beneath the conjunctiva, the thin, clear membrane that covers the white part of the eye. The aqueous humor is then absorbed by the surrounding tissues, reducing IOP.

Tube-shunt surgery is typically recommended for individuals who have uncontrolled glaucoma or have not responded adequately to other treatments such as eye drops or laser therapy. It can help prevent further damage to the optic nerve, preserve vision, and provide long-term IOP control. However, it is important to note that tube-shunt surgery is a complex procedure and carries risks and potential complications, including infection, bleeding, and scarring.