Laser Peripheral Iridotomy (LPI)

For patients with Closed or Narrow Angle Glaucoma, Laser Peripheral Iridotomy (or LPI) is an option. With Narrow Angle Glaucoma, the eye’s drainage canals become blocked or covered over (like a sink with a cover over the drain). This condition is much less common than Open Angle Glaucoma and differs in that eye pressure can rise very quickly.

A Laser Peripheral Iridotomy is a laser treatment that attempts to open alternative pathways for fluid to drain from the eye and prevent more serious glaucoma disease. The angle is the part of the eye that drains fluid from the eye and if it becomes narrowed, the eye is at risk for an acute attack of angle closure glaucoma. During the procedure a small hole is made in the iris to allow intraocular fluid to travel past the iris to the angle (drain) of the eye. For this type of glaucoma, this laser treatment is usually successful and long lasting. However, over time, the eye pressure can still creep upward, as the lens directly continues to worsen drain narrowing. This is resolved in most cases by lens removal (cataract surgery).