uneven pupil dilation

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.

[Jim Humphries, B.S., D.V.M.]

at his age I would say get him to the vet quite soon.  Reason is that if glaucoma is the cause that can damage the retina quickly.  Your veterinarian will want to make a determination and begin treatment immediately.  

let us know how he does.

[bkristin]

Okay, thanks.  I'll make an appointment tomorrow.  Since writing my question his pupils have been equal...