The front part of the eye is filled with fluid, which is called aqueous fluid. It is produced in the ciliary body of the eye and drains in the front part of the eye called the angle. The angle is the area between the cornea (clear front part of the eye) and the iris (the coloured part of the eye) as shown below.
Some patients have narrow angles as shown below and are at risk for angle closure glaucoma, which occurs when the angle is closed and the eye pressure becomes very high. This produces severe pain and eye redness. There may be irreversible damage to the optic nerve when the pressure remains elevated.
A prophylactic procedure called a laser peripheral iridotomy (LPI) is recommended in patients with narrow angles. This involves creating a small hole in the outer part of the iris to help widen the angle as shown below.
Some commonly asked questions about narrow angles are discussed below:
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