The Premier Online Magazine devoted
to Persian & Exotic Shorthair Cats
Have you ever wondered why the pupil of a cat's eyes becomes a vertical slit when it contracts, while most other mammals, including humans, all have eyes that contract to a tiny circle?
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Everyone is familiar with the expression, "Cats can see in the dark". There is a lot of truth to that old adage. If we examine more closely exactly what a cat sees, you will realize that a cat is looking at a very different world than what people see.
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Progressive Retinal Atrophy (PRA) is a genetic disease in cats that leads to a cat losing its eyesight. The symptoms of PRA are progressive, worsening over time. The cat may adapt to the gradual loss of sight so well that the owner never notices a problem.
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Unequal pupils is called Anisocoria and can be caused by a variety of conditions from trivial to life-threatening.
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