How long it takes to see with a glaucoma drainage valve implant varies according to the individual. It takes about 10 days to see clearly. Glaucoma drainage valve implants are mainly used for the treatment of refractory glaucoma (neovascular glaucoma). The principle of the surgery is to make an artificial channel in the corneoscleral rim and implant a glaucoma drainage valve, which functions to control intraocular pressure. When the intraocular pressure rises, the valve opens and the aqueous humor in the anterior chamber is drained under the conjunctiva, returning the intraocular pressure to normal. When the IOP returns to normal, the valve closes automatically so that the IOP does not continue to drop. Therefore, as soon as the intraocular pressure returns to normal after the surgery, you can usually see clearly, and the exact time it takes varies depending on each person’s physical condition. It takes about 10 days to see clearly, but it takes about three months for the surgical incision to heal completely and for scar tissue remodeling to be completed. After glaucoma drainage valve implantation surgery, it is important to have your eye pressure and fundus checked regularly and to keep an eye out for fluctuations in eye pressure.