Pannus is a general term for non-ulcerating inflammation of the cornea, untreated the condition can cause blindness. Patients present with a cloudy growth across the cornea including blood vessels and pigment. A common form of pannus is frequently seen in the German Shepherd Dog, and greyhounds, and is usually associated with too much sun exposure.

Life long topical medications, occasional local injections and protection from excessive sun is needed to control the pannus. The response to appropriate therapy is usually rapid and dramatic. In New Zealand it is rare for patients to need surgery.