Just for the past few days my cat's right pupil does not change its size. It seems to be "stuck" being large, as if she is in a dark room all the time. Her other pupil seems to be fine, changing sizes as usual but there is definitely something wrong with her right eye. She does not seem to be in any pain - she's still acting her usual self so I don't know if it's a necessity to take her to the vet but if anyone knows what is happening with her eye or have any suggestions on what to do, I would greatly appreciate it!! Thanks in advance.