Neodymium:yttrium-aluminum-garnet laser treatment of cystic granula iridica in horses: eight cases (1988-1996).

J Am Vet Med Assoc

Department of Companion Animals and Special Species Medicine, College of Veterinary Medicine, North Carolina State University, Raleigh 27606, USA.

Published: August 1997

Objective: To determine clinical features of cystic granula iridica in horses and outcome of horses treated with an ophthalmic neodymium:yttrium-aluminum-garnet (Nd:YAG) laser.

Design: Retrospective study.

Animals: 8 horses.

Procedure: An ophthalmic Nd:YAG laser was used to deflate cysts in all horses.

Results: Horses were examined because of visual impairment (n = 5), decreased jumping performance (2), or head shaking (1). Clinical signs associated with cysts resolved in all horses after treatment. Short- and long-term complications did not develop, and cysts did not recur.

Clinical Implications: Cystic granula iridica may cause vision impairment in horses. Treatment with an ophthalmic Nd:YAG laser appears to be safe and effective.

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