![]() While each of the problems above are likely to require veterinary consultation and specific treatments to solve the issue, there are still a number of general things you can do to keep your dog’s eyes healthy and to catch things early on.Ĭheck your dog’s eyes regularly by taking her to a bright area and looking for crust, discharge, or tearing, and making sure that there’s white around the eyeball. Brachycephalic or “flat-faced” breeds like the Pekingese, pug, and Shih-Tzu commonly have this problem. There are several potential causes of an altered pupil size in dogs, including inflammation in the frontal region of the eye, increased pressure in the eye, diseases that are focused in the iris tissue itself, a poorly developed iris, scar tissue build up in the eye, medications, and cancer. When that happens, you may see yellow mucus indicating the irritation. Unequal Pupils (Anisocoria) in Dogs - Causes, Treatment and Webb6 feb. Sometimes, though, this gland can become swollen and exposed. Anisocoria is the medical term for unequal pupil sizes. The gland of this eyelid protects the cornea by secreting tears. This may sound strange, but every dog has a third eyelid. Though it can occur in any dog, entropion is a leading health concern in breeds such as the Akita, American Staffordshire terrier, bloodhound, Chinese Shar-Pei, chow chow, English bulldog, English mastiff, Great Dane, Neapolitan mastiff, Rottweiler, spaniel, vizsla, and Weimaraner. ![]() These include: American cocker spaniel, bichon frise, Boston terrier, Havanese, miniature schnauzer, miniature and standard poodle, silky terriers, and smooth fox terriers.Īlso known as entropion, with this condition, your dog’s eyelids will actually grow or roll inwards, rubbing up against the cornea and causing damage and discomfort. But some breeds are more susceptible than others. This largely genetic condition will make the lens of your dog’s eye appear increasingly white or cloudy, coinciding with a progressive deterioration in his vision and eventually blindness.Īll dog breeds can develop cataracts, and it’s also possible to get them from disease, immune system problems, or injury. Provide Exercise, Discipline, Affection your Poochon may have an eye infection: Crusty gunk and discharge around the corners of his eyes Cloudiness Swollen eyelid Unequal pupil size.A CT-scan or a MRI may be warranted to rule out any lesions or growth in the brain that could be causing a cat’s differing pupil sizes. ![]() Tumors can sometimes cause differing pupil size, and a 13-year-old cat is at increased risk of tumors compared to a younger cat. If uveitis is present, your vet might want to run some tests for infectious diseases uveitis can sometimes have an infectious cause. Your vet may want to measure the pressure inside the eye using an instrument called a tonometer, to see if glaucoma is the cause. Anisocoria Anisocoria is a condition characterized by an unequal size of the eyes pupils. Treatment depends on the underlying cause. ![]() The third eyelid tends to elevate a little in the affected eye.Īlthough your cat seems unfazed by the condition, anisocoria can be a sign of a significant underlying disease a vet, or a board-certified veterinary ophthalmologist, should examine your cat promptly. Horner’s syndrome is a condition where the innervation to the pupil is disrupted, causing the pupil in the affected eye to become smaller.The affected eye has a larger pupil and will often bulge from the eye socket. Glaucoma is a condition in which increased pressure exists inside the eye. There are several potential causes of an altered pupil size in dogs, including inflammation in the frontal region of the eye, increased pressure in the eye, diseases that are focused in the iris tissue itself, a poorly developed iris, scar tissue build up in the eye, medications, and cancer (unlikely in a young puppy). Glaucoma is another common cause for differing pupil size in cats.The affected eye is the one with the smaller pupil. The most common cause of different-sized pupils in cats is anterior uveitis, a type of inflammation within the eye.Many things could cause anisocoria in your cat. The term for different sized pupils is anisocoria, and this sounds like what you describe. She was licking a lot last night, but not this morning. What could be wrong with my cat’s eyes? My cat isn’t acting weird. The condition or disease described in this medical article can affect both dogs and cats. Additionally, when the skull comes to a sudden stop, the. With the proper detection of the disease's underlying cause, treatment plans are available that should resolve the issue. Concussion of the brain may cause unequal pupils if the injury affects certain areas of the brain. This condition causes one of the dog's pupils to be smaller than the other. When I came home yesterday, my 13-year-old cat had one eye that was dilated and one that was normal. Anisocoria refers to an unequal pupil size.
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