Pupil appears to move to the side in the mirror to the point where it's a black half moon...

And I can see the green underneath. I've tried googling but can't find anything. Has anyone had this and is it an emergency room problem?

[Trish_GlaucomaUK Partner]

Hello. This isnt something I have come across before. If your vision is being affected I would suggest to go to the emergency room for further tests. It may be something of nothing but it is always worth going along to have your eye looked at just in case. Never leave it.