My opinion when involving the eyes is get it checked. Eyes can go from irritated to blind pretty quickly and many times once the damage is done, we can't reverse it.
With a pupil that is dilated vs. both eyes dilated we focus on retinal and optic nerve issues.
If both eyes there is a Feline Dysautonomia Syndrome, but it causes some other clinical signs aside from just the dilation.
Since today is Friday, I would get her checked.
Good Luck,
Dr.V
Dr. D.A. Vamvakias
Veterinarian