I’m been smacked in the face and dropped them multiple times on concrete, industrial linoleum tile, and hardwoods. Never even seen a crack. I’m sure there are things that can do so, like an airbag exploding in your face, but I can’t imagine shattered broken milled plastic not being dangerous as well.

You have to ask for glass. They bury it in favor of the garbage that scratches up over time.

That’s why I said it depends on how light your prescription is. The husband has coke bottle lenses and cannot do glass. But he has to use the case. He has to use a special cloth to clean the lenses. He has to check against cleaning chemicals. He has to be very careful or they scratch, doesn’t matter what “special coating” is there. Those lenses do scratch up.

I’m less than -2 in both eyes so the weight doesn’t matter so much for me. I drop mine on the (bacterial lava) floor of a patient care area and I can grab whatever industrial, don’t use bare hands, wipe is available to purge the lenses of bacterial and viral load. And then stick them loose in a pocket with keys, pens, loose change, scissors, and they come out after a couple hours of that scratch free.

I get hit in the face. For decades. And decades of dropping them on concrete and everywhere else. No issues, breaks, or scratches thus far.

What are the stats on that? Are they a reality for the curved milled glass lens? Or is it a falsehood used to sell planned obsolescence lenses?

Lol. Bullshit to quality plastic lenses last that long. I mean sure, if you never drop them and baby the heck out of them.

The hardest clear plastic isn't remotely close to being as hard as glass or sapphire.

As for the shatter thing, often glass lenses will have a plastic layer on the eyes side of the lenses that prevents shards. This does mean that the inside of your glasses will scratch easier than the outside, but the outside is what always gets abuse.