![]() Problems with the nerve supply to the eye and pupil can also cause anisocoria. When the intraocular pressure is elevated, the pupil dilates and is less responsive to light.ģ. Glaucoma, or increased intraocular pressure, can cause anisocoria. If the pupil is large due to iris atrophy, the only way the dog can control the light is by squinting. The pupil size controls the amount of light that enters to eye. It does not hurt the dog but may cause the dog to react to bright sunlight. This may happen at a different rate in each eye, leading to anisocoria. Sometimes the muscle of the pupil thins and degenerates as a function of age. If the pupils become uneven again, additional examination by a veterinary ophthalmologist is recommended.Ģ. But since the anisocoria went away on its own in your dog, we assume he had transient intraocular inflammation. Cataracts can be inherited in the Siberian husky. A cataract acts as a foreign body, causing an inflammatory response. One source of inflammation can be the development of cataracts, especially in young dogs. Sometimes it’s transient, and sometimes it requires medical treatment with topical or systemic anti-inflammatories. Muscle irritation due to intraocular inflammation can result from bumping the eye with a toy or against furniture, rough-housing with another dog, or other vigorous contact. It causes the pupil to become smaller (miotic). This happens when there’s irritation occurring at the muscles that make up the pupil (the hole in the iris) along with the muscles of the ciliary body (an area behind the colored iris). ![]() Intraocular inflammation, meaning inflammation somewhere within the eye. There are many causes, but, says veterinary ophthalmologist Nancy Bromberg, VMD, MS, DAVO, not knowing the breed, age, or activity of your dog makes it difficult to pinpoint the cause with certainty. Your thoughts?Ī: The medical term for different-size pupils is known as anisocoria. There was no change in his personality, appetite, or anything else. After the exam, I was told that in some dogs this was somewhat common and not to worry because my dog showed no signs of neurologic upset. The right one was constricted almost to a pinpoint while the left was fully dilated! I immediately took him to my veterinarian. Q: I noticed that the pupils of my Siberian husky’s eyes were uneven. ![]()
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