The choroid is the inner lining of the eyeball. it also might be something called "Dichroic Eyes" and it's genetic. My cat is a 8 year old Calico. It extends from the ciliary muscles to the optic nerve at the back of the eye. 7 Cool Facts About Cat Eye Colors ... Their eyes definitely do change not only with light and dark but with things going on around them. it's just when two colors appear in the iris at the same time. I noticed Onyx has black rings around the irises of his eyes. If you notice changes in your cat's iris or the appearance of splotches of other colors, contact your vet. For the sake of simplicity, we will refer to the benign form as iris melanosis and the cancerous form as malignant melanomas. Black Ring around my cat's eye Allison1ga. Depends, everybody is going around saying yeah, they are just Limbal Rings! Iris melanosis are caused by the proliferation of melanocytes, the cells responsible for the production of pigmentation. In people these are typically itchy, raised red and inflamed patches of skin that are dry and scaly. Dark spots can develop in cats of any eye colour and may be cancerous (malignant) or benign. Which they are for the majority but they can also indicate other things like heavy metal toxicity like copper, known as “Wilson disease”. It's not unusual for the iris … they start to get adult eye color around 6 weeks but may not set in until 3-4 months of age. Keep an eye out for skin lesions on your own skin. Cats can develop cat eye problems not just from a direct problem with their eyes such as cat glaucoma or cat herpes, but also secondary to systemic cat diseases such as feline immunodeficiency virus or cat leukemia. Cats can have a ring of pigment around the periphery of the iris, but I would not expect this to change noticeably at any point. If you see a dark outline around your iris -- the colored part of your eye -- this is your limbal ring. These lesions are often circular and resemble a ring, or a pattern of rings. The ciliary body is the set of muscles that contract and relax to allow the lens to focus on objects; it is also the source of aqueous humor, the clear fluid in the eye. Eye color commonly changes and fade with age. It is a dark-colored manifestation of the corneal limbus resulting from optical properties of the region. Occasionally, a cat will be "odd-eyed"; each eye is a different color. This is new, although I'm not sure how new, because I know he never had these when I first got him from Petsmart in February. no big deal either way. Cats usually have some variety of green, yellow, or blue eyes. nothing to worry about. It goes almost the whole way around. The appearance and visibility of the limbal ring can be negatively affected by a variety of medical conditions concerning the peripheral cornea. When it comes to cat health, eyes have long been of particular interest to me. I'm sure many of you have experienced a lasting interest in a condition when a cat Kittens are born with blue eyes. The iris is the colored part of the eye. Another sign of ringworm is if you – the cat's owner – develop skin lesions. A limbal ring is a dark ring around the iris of the eye, where the sclera meets the cornea. The iris is the colored ring around the black pupil. It is darkest when we are at our healthiest and naturally fades with age and poor health. I just noticed that she has a black ring around the inside of her right eyelid (her 3rd eyelid looks fine-hers have always been partly visible). Be something called `` Dichroic eyes '' and it 's genetic your iris -- the colored part of eye. The benign form as malignant melanomas start to get adult eye color around 6 weeks may. Something called `` Dichroic eyes '' and it 's genetic of age the.! Itchy, raised red and inflamed patches of skin that are dry scaly! 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