Why wont my ps3 read p3s games?

May be...

my ps3 reads ps2 games and dvds and cds but not ps3 games. Any ideas of why this is happening.(i have many ps3 games in 100% condition the ps3 game isn't the problem)

i think you blue ray lens are dirty or broken

just buy an xbox 360........................................

maybe the lense that reads it is dirty or damage