Many moons ago, long before i had cadilacs removed. i was working at a friends house. I always wore glasses (a necessity). For work, i always wore safety glass (a choice). after work, i was playing with a couple of the family's younger children and one of them threw a doll at me. i did not see it coming and the doll (we figured one of the glass button eyes) hit a lens of my glasses. The lens just disintegrated into millions of tiny granules about the size of coarse sugar granules. A trip to the kitchen faucet and running cold water for a minute or so into my eye and I was as good as any one-eyed person could be. No damage to the eye. The next day, i got new glasses and i was, once again, two eyed.
Before that happened, i never really knew what the properties of safety lenses were. i just knew the lens would not shatter into long sharp and piercing shards.
Tinker