My 16 year old came home from school today and said a teacher had noticed that one of his pupils was noticeably bigger than the other. I’ve got him to stand looking at a light to see if they change but the left one is still bigger. Going to phone for a drs appointment tomorrow but right now trying not to panic, shouldn’t have googled it but of course I did. Also feeling awful for not noticing this myself. Anyone know what this could be?