Why do cats’ eyes dilate when they attack?

Did you know that cats can have a disorder where one of their pupils dilates when they attack? That condition is called anisocoria. The good news is that it’s not a disease. However, sudden dilation is a cause for concern, and should be treated as an emergency by a veterinarian. The sooner your feline friend gets medical attention, the better the chance of preserving its vision.


During a cat attack, the pupils of the eyes dilate, a condition known as anisocoria. This condition affects cats and other animals, and can also occur in humans. It can be habitual, and even become permanent. A veterinarian should be consulted if your cat experiences anisocoria. Here are some symptoms and signs to look out for. A veterinarian may recommend surgery to remove the eye, or ongoing drug therapy. Toxicology symptoms in cats include vomiting, lethargy, reduced appetite, and muscle weakness.

Whenever a cat is excited or nervous, its pupils dilate. Generally, these feelings are triggered by negative stimuli, like a loud noise, or a stranger in the house. It is also a warning sign of attack, as a cat will lash out in fear and attack. But don’t panic. A cat with dilated pupils may not necessarily be a threat.

During an attack, the defending cat’s pupils dilate. This enables them to have a wider peripheral vision than the aggressor’s. The dilated pupil may also signal fear or light conditions. Because the eyes dilate, more light enters the eye. Another body signal that cats use to indicate their intentions is a slow eye blink. Cats dilate their eyes to show their aggressiveness, but don’t make assumptions based on these signals.


Cats can develop this condition for several reasons. They may develop poor vision, which may lead to accidents, like crashing into furniture. They may also lose interest in food and drink. Cats with dilated pupils may have problems defecating or urinating. Other symptoms of the disease include coughing, lethargy, and sluggish reflexes.

Although the prognosis of feline dysautonomia is grim, many cats survive the disorder with proper care. The condition is a chronic, life-threatening condition that affects the cat’s autonomic nervous system. While this system controls many basic bodily functions, it’s responsible for controlling eye dilation. When dysautonomia affects the cat’s autonomic nervous system, it prevents the cat from being able to regulate eye function, which results in constant dilation of the eyeballs.

The disorder has no cure, but some veterinarians have been successful in treating the symptoms. Physiological treatment aims to relieve the symptoms of dysautonomia and give the cat a fighting chance against the illness. The first step in this treatment is hydration. If needed, feeding tubes can be inserted into the animal’s stomach and provide life-saving liquids directly into its bloodstream.

Anisocoria in cats

Anisocoria in cats is a medical condition that causes the eyes to appear to be a different size than the rest of the eye. It can also be a result of an injury to the eye or a malfunctioning nerve. Treatment for this condition varies depending on the underlying cause. Some cats with anisocoria will lose their eyesight permanently. There are many possible causes for anisocoria, including eye trauma, brain injuries, and cancer.

If you notice your cat rubbing its eyes excessively, you should take your cat to the veterinarian. Anisocoria in cats when they attack may be a sign of other conditions. Some causes include eye cancer, corneal ulcers, and glaucoma. Cats with anisocoria may be prone to nausea, loss of appetite, and an increased risk of cancer.

Although it may be difficult to identify the exact cause of anisocoria in cats, treatment for the condition varies from case to case. If the condition is self-limiting, such as in Horner’s syndrome, treatment usually involves eliminating the offending substance from the cat’s body. If the condition has not improved, however, long-term medication may be necessary. If the symptoms persist for a long period of time, the veterinarian should be consulted.