While more common in dogs than in cats, cherry eye is still a possibility. It’s a condition characterized by a small, pink or red bulge poking out near the inner corner of the eye. That bulge is the tear gland, an essential part of tear production.

Aside from its strange-looking appearance, it’s also uncomfortable and painful. 

In this guide, we’ll talk about what cherry eye is, why it happens, how to spot it, and what the most effective cherry eye treatments are for cats.

What Is Cherry Eye in Cats?

The third eyelid, or the nictitating membrane, serves as a protective layer that also moisturizes the eyes. This membrane houses a gland that produces a significant portion of the eye's tear film.

When this gland pops out of its normal position, it gets exposed to infection and injury, while also losing its functionality. 

This condition is cherry eye in cats.

What Causes Cherry Eye in Cats?

Because the condition is rare in cats, the causes are not fully understood. Here are the suspected causes of cherry eye in cats:

Weak Connective Tissue

The most widely accepted explanation is that cherry eye in cats results from a structural weakness in the connective tissues that hold the tear gland of the third eyelid in place. When these tissues fail, the gland slips out of place and gets exposed.

This can be congenital and can also be influenced by the elasticity of the cat’s eye structures.

Genetic and Breed Predisposition

Another suspected cause is genetics. Some breeds, namely Persians, Burmese, and Himalayans, are susceptible to cherry eye due to their unique facial structures. This puts strain on the third eyelid, which results in less stability. 

Inflammation or Eye Trauma

Another potential trigger for gland prolapse is eye inflammation. Conditions such as feline conjunctivitis can cause swelling around the third eyelid, compromising structural integrity, potentially leading to cherry eye.

Similarly, trauma to the eye or surrounding area can increase the risk of the tear gland popping out. This means that, other than accidents and animal fights, the slightest scratches can contribute to feline cherry eye.

What are the Signs of Cherry Eye in Cats?

While cherry eye in cats is uncommon, it’s easy to identify once it develops. Here are the common signs:

• Visible Red or Pink Lump. The most obvious sign of cherry eye in cats is the appearance of a fleshy, red or pink bulge on the corner of the eye. It typically resembles a small cherry, which is where the name comes from. This protrusion can worsen over time. 

• Excessive Tearing or Eye Discharge. Cats with cherry eye may produce more tears than usual. The prolapsed gland can disrupt the eye’s normal tear distribution, leading to watery eyes. In some cases, a thick, mucus-like discharge can be present, which can also indicate an eye infection. 

• Squinting or Frequent Blinking. The exposed prolapsed gland can cause persistent pain and discomfort, resulting in squinting or frequent blinking. 

• Pawing or Rubbing at the Eye. In addition to squinting, many cats also tend to paw or rub at their eyes in an attempt to relieve discomfort. They can also use the surrounding furniture as a scratching tool. However, this can make things worse. 

• Swelling or Inflammation Around the Eye. In some cases, the surrounding tissues can appear swollen and inflamed, especially if the tear gland is infected. This increases the risk of several eye issues, such as dry eye.

• Behavioral Changes. Cats with cherry eye can be visibly stressed and uncomfortable. They tend to be more withdrawn, less playful, and more sensitive to touching.