Well I've just dropped him off at the vet.
They have decided to leave his eye alone as apparently it is too slight to worry about now. Apparently a little scar has formed joining the 3rd eyelid to his bottom eyelid, but the vet said not to worry about it as it shouldn't hurt him in any way. He said that if they break down the scar tissue, it is likely that it will just re-connect. He said that if it ever becomes a problem they would look at it then, but leave it for now.