the game has a blue bottom disc and the old rumor was the blue discs mess around with the lens of the console.
Blue bottom discs are CDs, not DVDs. DVDs on the PS2 are silver.
CDs don't mess with the laser. Rather, they're slightly thinner than DVDs, and so some PS2s have problems reading the disc. It doesn't hurt the laser, your disc just won't load.
This can be remedied in two ways: First, try laying the console sideways. A lot of times, the PS2 can read CDs/blue discs/PSX games that way.
If THAT doesn't work, you can put four pieces of tape around the hole in the middle of the disc. The extra weight will let the PS2... spin it up properly.