Anisocoria (Different Pupil Sizes) in Dogs

Overview of Anisocoria (Uneven Pupils) in Dogs

Anisocoria, a common problem in dogs, is an inequality of pupil size, when one pupil is dilated and the other is constricted. The cause of anisocoria varies in dogs. Nervous system abnormalities, as well as infection, inflammation, cancer or trauma involving the eye can also result in anisocoria.

Causes of Unequal Pupil Sizes in Dogs

Nervous System Causes

Ocular Causes

Anisocoria can be associated with multiple disease processes, and may be just the initial sign of severe or even life-threatening illness.

What to Watch For

Diagnostic Tests for Anisocoria in Dogs

Treatment of Anisocoria in Dogs

It is difficult to treat dogs with anisocoria symptomatically, as there can be multiple underlying causes that are treated in very specific ways. Your veterinarian may recommend several treatments while results regarding an underlying disorder are pending.

Home Care