we'll have to check your peripheral, but your right, you can take a hit 100X hotter then class IIA and survive it, 9999 times out of 10,000. The lower classification rules are set up in such a way that its a 1 in 10,000 risk. So if you scan the same flat scan 1000 times over that 7 mm dia meter eye, you may be down to 1 in 10.
The aiming beams in a eye surg system can go as high as 7 mW, most are 3.5 mW It takes 200 mW minimum of argon to really work on a retina, often as much as 400, depending on spot size. So you can see why they picked 350 microwatts and .1 mW.
I just dont want to see it become, a big boys only club, ie if its 40 grand and ilda corporate membership to play the game, I'm out. 3-5K one time and insurance, plus a nist tracable power meter is reasonable. Above that, its a ripoff.
what people miss is you cant have a fixed flat scan, you need to even keep that moving, and somewhat randomly, so it never dwells in one place for more then one 7 mm wide scan at the audience position. I've attended courses on the math, and it could be built into software , provided, A you have a power meter built into the laser, B you have a know diameter, C. You have a failsafe D. You have a industry standardized and documented scan pattern.
just my 10 cents (hey, inflation is bad!)
Steve