What Does It Mean That My Cat Have One Blown Pupil. However, if a cat is excited and about to pounce, their pupils will become round and large. Hypertension in cats is one of the leading causes of dilated pupils.
If you look at your cat’s eyes, you will see that the pupils are almost of the same size and shape. The most obvious symptom of blown pupils is having one or both pupils that appear abnormally dilated (large) and do not react to light. Is it something which happens a lot or only some of the time?