What is Horners syndrome in dogs?
Horners syndrome is a common neurological disorder of the eye and facial muscles. The condition usually occurs suddenly. The most common symptoms are: • drooping of the eyelids on the affected side (ptosis) • the pupil of the affected eye will be constricted (miosis) • the affected eye often appears sunken (enophthalmos) • the third eyelid of the affected eye may appear red and raised (prolapse of the third eyelid, conjunctival hyperemia) What causes Horners syndrome in dogs? Horners syndrome in canines is due to a dysfunction of the sympathetic nerves of the eyes and surrounding facial muscles. This is part of the autonomic nervous system, which helps to control normal functions such as blinking, muscle tone, etc. There are many reasons for Horners Syndrome in dogs. The most common cause is classified as ideopathic which means it is self-originating and without known cause. The onset can be very sudden. Within a few hours you observe that your dog has drooping eyelids and may be havin
