uneven pupils

My 10 yr old female cat recently started having uneven pupil constriction/dilation ie. both eyes have different pupil sizes. She seems happy and healthy otherwise.
Any ideas?

Sounds like it's time for a vet visit, OliviaG. A lot of different things can cause unequal dilation of the pupils. Only a vet will be able to determine exactly what's going on with your kitty.