What is the third eyelid?
Dogs, cats, rabbits and many other animals have an additional eyelid at the middle corner of their eyes, called the third eyelid. The functions of the third eyelid are to help with the lubrication of the eye by spreading the tears evenly on the surface of the eye, protect the eye from injuries and trauma (i.e., scratch injuries) and act as a “wiper blade” to keep the cornea of the eye clean!
Most third eyelids are barely noticeable in pets. They can vary in colour and some of them are pink, others black or can present with mixed colouration. The third eyelid is “home” for the third eyelid gland, a very important gland which produces up to 30% of the normal tears.
Signs of a third eyelid
In the event of an injury, neurological problems or painful conditions the third eyelid becomes inflamed and more prominent, covering part or the majority of the surface of the eye. It is frequently described as a “membrane” or as if “the eye is rolling back in the head” by owners when a problem becomes apparent.
In addition to the above-mentioned conditions, the third eyelid can become affected by growths (tumours or cancers) and, following certain surgeries, develop cysts which require decompression.
Diagnosis of a third eyelid
Diagnosis of the problem is straight forward as the third eyelid should not be easily noticeable. If the third eyelid comes across one or both eyes, you should seek advice from your vets.
Treatment of a third eyelid
Treatment depends on the underlying condition and problem. In most cases, once the underlying problem is addressed, the third eyelid will return to its normal position.
Our mission at Vet Eye Care is providing the best care for your pets. Our ophthalmologists are able to diagnose and treat all ophthalmic conditions promptly, following a referral request from your vets. If you feel your pet will be benefit from a consultation with one of our specialists, ask your general vet for a referral. Contact us today and benefit from our competitive prices.