A cat's pupils that keep enlarging but not shrinking may be caused by poisoning, brain death, or problems with the iris magnifying muscle. You can first shine a flashlight into the cat's eyes to see if the cat's pupils can shrink. If there is still no reaction, check You need to take the cat to the pet hospital for examination and treatment immediately.
Tips:
The enlargement of the cat's pupils but not contraction is a serious condition, so it needs to be taken seriously to avoid delaying the condition.