Hi. I noticed this morning that one of my cats appeared to have uneven pupils. After watching for a second they evened out. I've been watching all day and it seems that on occasion, his pupils dialate at slightly different rates - fast enough that by the time I get the camera ready to snap a picture for my vet they are even. He is acting fine in every other way. A few days ago he did seem to be keeping that eye closed more, but could open it fully and it's fine now. The eye itself looks normal.
I know there are many causes of uneven pupils, but have never come across uneven dilation. Should I get him into his vet asap?
Thanks for any advice.