Cats Eyes Dilated Dying. Nystagmus causes the involuntary and rhythmic oscillation of the eyeballs; In certain situations this difference may be habitual, however, when the condition becomes permanent, it is not normal and we must act.
If a cat is losing its sight, eyes will remain dilated constantly. You might also notice very dilated pupils as your cat’s eyes try to get more light into the back of the eye. Also, squinting behavior and bloodshot eyes are indicators of pain in cats.
It's not unusual for the iris to change with age.
This is a defensive mechanism to prevent predators from spotting them in a vulnerable state. This means that in the early stages of illness, often the only thing that a cat owner may notice is that the cat has become quiet and withdrawn. This is a defensive mechanism to prevent predators from spotting them in a vulnerable state. Cats in a stupor only respond to strong stimuli, while cats in a coma do not respond to any form of stimuli.