That same source makes near 1 W laser pointers (close to 200 times more powerful than the 5 mW ones used in the classroom). According to them, "Under review by Guinness World Records, the Spyder 3 Krypton is the world's brightest handheld laser. Our Earth's atmosphere ends at 62 miles, but the Krypton goes beyond as it breaks through our atmosphere, into outer space. With its extreme range of 85 miles, the S3 Krypton is the first and only handheld laser visible from outer space. Directly viewing the dot of the Krypton <1W laser (86 million lux) will appear over 8,000 times brighter than looking directly at the sun. Safety goggles are a must."
I saw one in operation two months ago at an outdoor astronomical observation gathering. Unbelievable! I can certainly see how anything more than a split second could inflict eye damage.