Here is a good example of a delightful young lady (well some are young, others may be verging on the senile!)we see from time to time in ophthalmology. She has a twin sister who we see more regularly – but she’s not an identical twin. Who are these two females?!
Well pardon the rather lame joke, but that was Polly Coria (i.e. many pupils as there is iris atrophy giving holes which appear as additional pupils – note there is also cataract here). Here sister is of course Ann Iso Coria (i.e. differently sized pupils), pictured here in a cat with Horner’s syndrome giving a constricted pupil, enophthalmos with third eyelid protrusion and upper eyelid ptosis as well.