Unequal pupils in my 8 month old cat

Hi guys can you help please?
Yesterday my cat (8 months old) was playing outside and when he came in i noticed his one pupil was much larger than the other then this morning I saw it was much better the one is slightly larger but hardly noticeable . There is no sign of physical injury . He is acting normal eating playing sleeping etc?

PaulADC said:

Hi guys can you help please?
Yesterday my cat (8 months old) was playing outside and when he came in i noticed his one pupil was much larger than the other then this morning I saw it was much better the one is slightly larger but hardly noticeable . There is no sign of physical injury . He is acting normal eating playing sleeping etc?

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This happened to my kitten after I was playing with her and accidentally whacked her in the eye with the toy once. She had unequal pupils for about a day and then it normalized. Sometimes with eye trauma people (and I'm assuming cats) can get ciliary spasm where the muscles that control the pupil size spasm, but then it self-resolves. If he is walking and running fine and not bumping into things, AND you've noticed an improvement in the pupils, probably nothing to worry about

Even though his pupils are going back to normal, this is still worth a visit to the vet.  At the very least, keep a close eye for it happening again, and if it does, definitely take him to the vet ASAP.   Uneven pupil sizes can be signs of an underlying health condition (sometimes serious) so you do want to take this seriously.   

The fact that it seems it was only temporary does suggest that this is just the result of some minor trauma - getting something in the eye or, as noted above, being hit in the eye.  

Thank you junoandnori margd
I have been watching him very closely he is still eating and was vey energetic whilst playing last night . His pupil seem completely normal again. I think it is possible that he ran into a light plastic chair while playing outside and that might've been the cause.