1. Uveitis: Uveitis is inflammation of the uvea, which is the middle layer of the eye. It can cause redness, swelling, pain, and blurred vision. Uveitis can be caused by various factors, including infections, trauma, autoimmune disorders, or cancer.
2. Corneal Ulcers: Corneal ulcers are open sores on the cornea, which is the transparent outer layer of the eye. They can appear as reddish-brown spots and can be caused by trauma, infections (such as herpesvirus or bacterial infections), or other conditions that affect the cornea.
3. Conjunctivitis (Pink Eye): Conjunctivitis is inflammation of the conjunctiva, which is the thin membrane lining the eyelids and covering the white part of the eye. It can cause redness, swelling, discharge, and irritation. Conjunctivitis can be caused by allergies, infections, or other irritants.
4. Eyelid Problems: Some eyelid conditions, such as entropion (inward rolling of the eyelid) or ectropion (outward rolling of the eyelid), can cause the eyelid to rub against the cornea, leading to irritation and reddish-brown spots.
5. Tumors: In rare cases, reddish-brown spots in the eye could be a sign of tumors or growths within the eye.
It's crucial to consult a veterinarian if you notice any changes in your cat's eyes, including the development of reddish-brown spots. The vet can perform a thorough eye exam, including specific tests and diagnostics, to determine the underlying cause and provide appropriate treatment.