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Iris Cyst

Issue Description
A small hollow structure either attached to the iris of the eye or floating free in the anterior chamber. An iris cyst is composed of a single cell layer of epithelium and is filled with fluid. It is most commonly seen as secondary to inflammation in the eye, especially with glaucoma.
Other Names
Uveal Cyst

Breeds Affected
Golden Retrievers, Labrador Retrievers, and Boston Terriers are the most commonly affected breeds.

Iris cysts usually cause no symptoms, but in large numbers they can cause glaucoma by obstructing the drainage angle of the eye.

Iris cysts need to be differentiated from iris melanoma, a tumor, by demonstrating their hollowness.

A light directed at an iris cyst will cause it to transilluminate. Iris cysts can be collapsed if necessary by a veterinarian with a small needle carefully introduced into the anterior chamber. The cysts may also be destroyed by use of a semiconductor diode laser.

Horse Herd