The LPI procedure is done for closed-angle glaucoma, or in people who have “narrow angles” at the front of their eye. It is performed to prevent or treat an attack of glaucoma, which can cause redness, eye pain, haloes around lights and may eventually lead to loss of vision. A lens is placed on the eye and the laser is used to make a small hole (much smaller than your pupil) in the peripheral iris (colored part of the eye). This small hole allows fluid to pass within the eye and sometimes improves the “narrow” appearance of the front of the eye. You will be on a short course of anti-inflammatory eye drops following the laser.