The Second Amendment has generally not been held to prohibit banning or restricting dangerous objects that are not weapons, nor weapons without plausible self-defense functionality, nor narrow classes of weapon that are popular for reasons other than self-defense. It definitely wouldn't prohibit slapping age limits on the things. (California, where I live, has a ban dating from the Eighties on many martial arts/"ninja" weapons, probably because they were thought at the time to be inordinately popular among young people. Take this how you will; I feel it's kind of a joke, personally.)

That said, I feel this would be adequately covered by existing law without throwing bans around -- aiming a laser pointer powerful enough to blind at someone would, at minimum, qualify as assault.

(IANAL, though.)

Oh, and XiXiDu is German too.