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What Causes Cherry Eye in Dogs? Cherry eye in dogs is caused by the prolapse of the third eyelid gland, which appears as a red, swollen mass in the corner of the eye.
This condition occurs when the gland responsible for tear production becomes displaced due to weakened connective tissue, leading to visible irritation and swelling.
Understanding Cherry Eye
Cherry eye is a common condition in dogs, particularly in younger pups and certain breeds, where the third eyelid, or “nictitating membrane,” protrudes due to a displaced gland.
This membrane plays a crucial role in protecting the eye and aiding in tear production.
When the tissue supporting the gland weakens, it causes the gland to slip out of place, forming a red, swollen lump in the inner corner of the eye that resembles a cherry.
While this prolapse is not typically painful, it can lead to discomfort and potential infections if left untreated.
For further understanding of canine eye anatomy, you can explore more about it on Wikipedia.
What Causes Cherry Eye in Dogs?
The exact cause of cherry eye varies, but it is generally attributed to several factors. Below are the most common causes and triggers for this eye condition in dogs:
- Genetics and Breeds: Certain dog breeds are more likely to develop cherry eye due to genetic predisposition. Breeds like Bulldogs, Beagles, Cocker Spaniels, and Shih Tzus are among those more commonly affected. The genetic factor lies in the connective tissues that hold the third eyelid’s gland in place. Some dogs are born with weaker or more elastic tissues, making the gland more prone to displacement.
- Weak Connective Tissue: Weak connective tissue is the primary cause of cherry eye. The gland is held in place by a small ligament that can weaken over time or as a result of genetic factors, leading to the gland slipping out of place.
- Age and Development: Cherry eye most frequently affects dogs that are younger, typically under two years old. This is because the connective tissue in younger dogs is still developing, making it easier for the gland to prolapse.
- Environmental Triggers: In some cases, environmental irritants such as dust, allergens, or exposure to wind can aggravate the condition. If a dog’s eye is already sensitive or prone to inflammation, these factors can contribute to the gland’s prolapse.
For more comprehensive information on environmental factors affecting pet health, see our guide on common pet irritants and allergies.
