Very few people wear actual glass lenses. They are something like 1-2% of the market from what I can tell. Everyone else wears plastic lenses, which are much lighter and thus more comfortable to wear. Also slightly safer due to much reduced risk of shattering with plastic lenses. I've never even had an optometrist offer glass lenses. I think you'd have to specifically ask for them.
But yeah, dust can also definitely scratch the coatings on glass lenses, too.
Dust is harder than hard plastic?
A large amount of dust is essentially powdered rock, which absolutely is harder than the plastic you would generally find in optical lenses.
Good glasses are in fact glass with PVD coating, that's where the scratches show up. And yes dust particles are often very hard.
Very few people wear actual glass lenses. They are something like 1-2% of the market from what I can tell. Everyone else wears plastic lenses, which are much lighter and thus more comfortable to wear. Also slightly safer due to much reduced risk of shattering with plastic lenses. I've never even had an optometrist offer glass lenses. I think you'd have to specifically ask for them.
But yeah, dust can also definitely scratch the coatings on glass lenses, too.
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