Very, very, very, very, very different. The lasers we are talking about are beams, which means they are not subject to significant intensity falloff over distance. Thus, the energy they put out at the source can be efficiently transmitted over great distances directly to your eyeball. This causes further problems when the laser can deliver enough energy to damage your eye, or even permanently destroy it, in less than the ~150 milliseconds it takes you to reflexively blink it. Run this thing over a bunch of broken glass and you will have legitimate problems with localized areas of dangerously high light intensity.
Also, lasers are not toys. Do not let children play with them. Do not let anyone "play" with the green ones or any stronger lasers. You are taking insane risks when you do; yes, you can probably keep it out of your eyes but it only takes a moment's inattention and you can be talking serious lifelong consequences. It's a poor tradeoff for entertainment purposes.
Not only is this design far, far too dangerous to let out into the public in a big way, even the testing was far more dangerous and hostile to the people in the area than the engineer realized.
Also, lasers are not toys. Do not let children play with them. Do not let anyone "play" with the green ones or any stronger lasers. You are taking insane risks when you do; yes, you can probably keep it out of your eyes but it only takes a moment's inattention and you can be talking serious lifelong consequences. It's a poor tradeoff for entertainment purposes.
Not only is this design far, far too dangerous to let out into the public in a big way, even the testing was far more dangerous and hostile to the people in the area than the engineer realized.