Different pupil sizes

[Bobbisumbler]

Ive recently noticed my 5 month old son has a larger right pupil, ive looked back on photos and it has been this way since birth. He has a dr appointment tomorrow however wondering if this has happened to anyone else?
i need some peace of mind to get me through the night!

My eldest has this. Did get referred for tests at 10 months to make sure, but all absolutely fine, just how they are.

I have this. It was discovered last year. They queried a syndrome (in short, I'm undiagnosed, consultant can see something but can't give me a name for it) and all other tests were clear

Is it all the time?

I sometimes (especially first thing in the morning) have a much larger pupil (think full in one side and medium in the other). I first noticed it 25 years ago. I've had various tests and check ups on it, and the conclusion is one of those things.
Main issue it gives me is if there's bright light when I have the larger pupil, I very quickly get a migraine because it doesn't go small quickly.

Its only in the light, we have been to the doctors and she did physical tests, so turned the lights off and they went normal size and turnt lights on and right one went bigger so have been referred to paediatrics