Tube shunt surgery is a procedure used to treat conditions like glaucoma, which can cause increased pressure in the eye. During the surgery, a small tube is implanted to help drain excess fluid, reducing pressure and preventing damage to the optic nerve. The surgery typically involves creating a small incision in the eye and placing the tube in the anterior chamber. The other end of the tube is connected to a reservoir, allowing fluid to flow out of the eye. This helps maintain a healthier pressure level, improving vision and overall eye health.