Anisocoria (unequal pupil sizes) in Cats

Feline Anisocoria (unequal pupil sizes)

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

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 (unequal pupil sizes) in Cats

Treatment of Anisocoria (unequal pupil sizes) in Cats

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

Home Care