The nictitans glands produces about a third of the fluids that make up the tear film that keeps the surface of the eyes moist. These glands are located in the third eyelid and they can prolapse to present as “Cherry eye”. This condition can often affect both eyes.
Certain breeds like bulldogs and mastiffs commonly present with this problem.
There are a number of techniques for dealing with this condition.
Excision or cutting the gland out is rarely the correct treatment as there is a high risk of problems with dry eye in later life but the pocket technique is the one that we most commonly use to tuck the prolapsed gland(s) back into position.