Question about blu ray ps3 games and scratches

[jon3619]

heya

ive noticed that on a few of my ps3 games i have scratches that can be seen at certain angles under light, seeing as games are not like movies where u can just watch them and see if they still work is there anyway of knowing if the scratch will affect the disk without having to replay the game which could take 10+ hours....

i first noticed a scratch on modern warfare 2 and them some on devil may cry 4 and oblivion...they dont look like deep scratches as you cant see them without getting the disc at the right angle, does the protective layer on blu rays also help the disc data stay intact or only help prevent stratches in the first place

thank you for any infomation.