I say again I am a pilot not a medic I don't have a clue if it effects you.
I have scaring on my eyes from welding and getting arc eye and it wasn't even mentioned when they examined me.
There is guidance on the CAA medical site on what is or isn't allowed. BUt until you go for the initial you wont know. Its not uncommon for people to go there worrying about one thing then fail on something completely different which they didn't have a clue about they were affected by it.
Don't worry about it just go and see what they say. They are actually pretty nice in the medical section its really not something to get scared or wound up by. If your good they will give you a medical if there are problems they will sit you down and tell you about the options. If you fail there really isn't anything you can do about it.