I have been to Opticians twice and had further scan you can buy extra and everything came back fine. My left eye is slightly longsighted and i have slight anisicora too. Which i have heard is very common and effects 13.5 million people in the UK. Had a CT scan too and that came back fine. The problem i have noticed which is only mild but it drives my health anxiety insane is when i close right eye and then switch over to my left back and forth it’s seems like my left is a little darker like the colours aren’t as bright as they seem in my right. Im guessing my eye docs would of found something If there was something wrong.