Cats are great at hiding ailments but picking up early signs of vision problems is important in preventing permanent blindness.
Cats, with their elliptical pupils, are able to detect movement much better than human eyes, making them ideal for hunting. Their field of vision is about 200°. They have a shiny membrane, the tapetum lucidum, at the back of their eyes. This allows them to see in low light. In a dark room, this shiny membrane will reflect light from a flashlight. They also have a third eyelid that protects their eyes from injury when out in the dark or hunting.
Blindness is the inability to see as clearly and is often detected when pets start walking into objects. It can be partial or complete. Vision loss can occur over a period of time or suddenly and is more commonly seen in middle-aged to older cats. Sudden vision loss is a serious problem and requires immediate veterinary care.
Common signs of vision loss:
Sudden blindness occurs more commonly in older cats with hypertension rather than young cats. These cats appear confused and fearful. Whereas cats that have had time to adapt to deteriorating sight are more relaxed.
Cats that show signs of sudden blindness should be seen by a veterinarian immediately as the earlier the detection the better the prognosis.
Simple tests for you to try at home to determine if your pet has vision loss:
Common causes of vision loss:
Senior pets can adjust quite well to slow-onset blindness by relying on their sense of smell, hearing, and knowledge of their home environment.
Tips that may help a senior pet with slow-onset blindness:
Blindness due to high blood pressure can easily be prevented with regular veterinary examinations. This is important as once sudden blindness occurs, very few cats regain their sight.
Pets that suddenly start bumping into things should be seen by a veterinarian immediately. In some cases we can reverse the sudden blindness when treatment is started before permanent damage has occurred.