Laser surgery treatments may be effective for different types of glaucoma. The laser is ussually used in one of two ways.

In open-angle glaucoma , the drain itself is treated. The laser is used to modify the drain itself is treated. The laser is used to modify the drain (trabeculosplasty) to help control eye pressure.

In angle-closure glaucoma, the lasers creates a hle in the iris(iridotomy) to improve the flow of aqueous fluid to the drain.