Why Is My Cat's Third Eyelid Showing? When to Worry

Why Is My Cat's Third Eyelid Showing? When to Worry

• What Is the Third Eyelid?
• Causes of the Third Eyelid Showing in Cats
• When to Worry About Your Cat’s Third Eyelid Showing
• What to Do If Your Cat's Third Eyelid Is Visible
• Omnia Pet: Your Source for Cat Health Products

What Is the Third Eyelid?

The third eyelid, also known as the nictitating membrane, is a thin, translucent membrane located in the inner corner of your cat's eye. It acts as a protective shield for the eye, helping to keep it moist and free from debris. This membrane is not always visible, but when it becomes noticeable, it may signal an underlying issue that needs attention.

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Function of the Third Eyelid

The primary function of the third eyelid is to protect the eye from harm. It moves across the surface of the eye when the cat blinks, distributing tears and helping to clear away any foreign particles or dust. In some animals, the third eyelid also helps to provide additional protection in harsh conditions, such as sandstorms or when the animal is swimming.

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Causes of the Third Eyelid Showing in Cats

If you notice that your cat's third eyelid is showing more than usual, it could be a sign of various underlying issues. Here are some common causes for the third eyelid to become visible:

1. Illness or Infection

One of the most common reasons the third eyelid might show in cats is due to illness or infection. When your cat is feeling unwell, especially with viral infections like upper respiratory infections, the third eyelid can become more prominent. This is a response to the body’s stress or discomfort and can be accompanied by other symptoms, such as discharge from the eyes or nose, lethargy, or loss of appetite.

2. Dehydration

Dehydration is another cause for the third eyelid to become visible. Cats that are not drinking enough water may begin to show signs of dehydration, including the appearance of the third eyelid. If your cat is showing signs of dehydration, it’s important to address this issue as soon as possible, as dehydration can lead to more serious health problems.

3. Eye Trauma or Injury

If your cat has suffered an injury to the eye, the third eyelid might be more noticeable as it works to protect the eye. Scratches, foreign objects, or any form of trauma can lead to the third eyelid becoming more visible. In this case, prompt attention from a veterinarian is necessary to prevent further damage.

4. Horner’s Syndrome

Horner’s syndrome is a condition that affects the nerves that control the muscles around the eye. One of the symptoms of Horner’s syndrome is the appearance of the third eyelid. This condition can be caused by a variety of factors, including nerve damage, trauma, or tumors. If your cat’s third eyelid appears suddenly and is not related to infection or injury, it’s important to seek veterinary advice.

5. Other Health Issues

Various other health issues, such as eye infections, conjunctivitis, or even tumors, can cause the third eyelid to show. Sometimes, the third eyelid may appear as part of a larger health issue that affects your cat’s overall wellbeing.

When to Worry About Your Cat’s Third Eyelid Showing

While the occasional appearance of your cat's third eyelid may not be a cause for concern, there are situations where it could indicate a more serious health issue. Here are some red flags to watch for:

1. Persistent Third Eyelid Visibility

If your cat’s third eyelid remains visible for an extended period or becomes more noticeable over time, it’s a good idea to consult a veterinarian. Persistent third eyelid visibility is often a sign of an underlying health problem that requires professional attention.

2. Accompanied by Other Symptoms

If your cat’s third eyelid is showing along with other symptoms such as lethargy, poor appetite, excessive drooling, or discharge from the eyes, it’s time to seek veterinary care. These could be signs of an infection, injury, or more serious health issues like a neurological disorder.

3. Sudden Appearance of the Third Eyelid

If you notice the third eyelid suddenly appearing without any obvious cause, such as trauma or illness, it could be a sign of something more serious like Horner’s syndrome. This condition requires immediate veterinary attention, as it could indicate a neurological issue that needs to be addressed.

What to Do If Your Cat's Third Eyelid Is Visible

If you notice your cat’s third eyelid is visible, it’s important to monitor for any other signs of illness or discomfort. Here’s what you can do:

1. Observe Your Cat’s Behavior

Keep a close eye on your cat’s behavior and look for any other symptoms, such as changes in appetite, energy levels, or signs of pain. If you notice anything unusual, it’s best to consult with a vet.

2. Keep Your Cat Hydrated

If dehydration is a concern, make sure your cat has access to fresh water at all times. You can also try wet cat food or adding water to dry food to help increase hydration levels.

3. Visit the Veterinarian

If the third eyelid persists or is accompanied by concerning symptoms, schedule a visit to your veterinarian. The vet will perform a thorough examination and may recommend further tests or treatments depending on the cause of the problem.

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