A cat that keeps one eye half-squinted may be caused by a variety of reasons. Here are some possible causes and corresponding treatment suggestions: Sunlight exposure: If a cat’s eyes are exposed to direct sunlight, a stress reaction may occur, causing the eyes to be half-squinted. This is a normal physiological phenomenon and does not require medication. As long as the cat is prevented from being exposed to strong sunlight for a long time. Mosquito bites: If a cat's eyes are bitten by mosquitoes, it may cause local skin and soft tissue damage, causing swelling, itching, pain and other symptoms, making it impossible to fully open the eyes. In this case, you need to use antihistamine and anti-inflammatory ointments as directed by your doctor.

Ocular inflammation: Conjunctivitis, keratitis and other eye inflammations are also common causes of half-squinted eyes in cats. . These inflammations are usually caused by external stimulation or bacterial infection. Symptoms include conjunctival congestion, increased secretions, and itchy eyes. For eye inflammation, you need to use pet-specific antibacterial eye drops for treatment and follow the instructions of your veterinarian.

Living environment and infection: If the cat’s living environment is not clean enough, or the cat is slightly infected, it may also cause half-squinting of the eyes. In this case, you can try to improve the cat’s living environment and use immunity-enhancing drugs for conditioning and observation. If the symptoms are not relieved, it is recommended to seek medical treatment promptly.