Thanks for your help everyone! I'll update you on his condition in a couple of days! :D
If anyone else has any ideas then feel free to comment, I'll be checking now and again :p
xxxXXX
... Ok, so I know chameleons do naturally have "bulgie" eyes but I've noticed that when mine blinks his right eye a bulge pushes out the side of his head... like the eyeball is being pushed back. Also, he tends to keep it closed a lot.... I can't see any puss or irregularitys but its just...