There is a federal shatter standard for all prescription eyeglass lenses.
Very small particles will not be a problem.
They do not have enough momentum to break the lenses.
Plastic lenses are more shatterproof, but more easily scratched.
Long ago I had 'shooting glasses' made up using stick wire frames and polycarbonate lenses.
They are not real safety glasses (no side shields, no lens pop out protection) but should stop most smaller things.
If a bullet encounters even actual safety glasses they are going to fail.
In my shop with milling machinery, a lathe, table saw, drill press, bandsaw, jointer, etc. I use actual safety glasses (and often hearing protection).
I use muffs in the shop when needed (router, etc.) but prefer EAR plugs for shooting (but use both muffs and plugs for some rifles and larger handguns (.45 Win Mag)).
If I end up in the side wall lane at the indoor range, plugs and muffs are often required even with a .45 ACP.