In article qwx5f.11743$MN6.3431@fed1read04, BillP
wrote:

Robin S. wrote:

I have prescription safety glasses and I work with abrasives every day,
both
silicon carbide and aluminium oxide stones and paper/cloth, wheels, etc. I
have no scratches on my glasses and have had them for nearly two years.

Mine are made by AOSafety and have the thicker lenses (as opposed to the
polycarbonate). They're thicker but I think cost less. It occurs to me now
that they might be more scratch resistant (important where I work).

Regards,

Robin



Robin-
You're apparently fortunate in that your exposure to extreem abrasives
is one where you apparently don't have the stuff slung in your face on a
constant basis. I constantly have muddy and sandy slurry in my face and
cannot stop to rinse it off, so it often dries on. (I often CANNOT let
go of what I'm doing)
Dried on mud and fine sandy deposits do NOT just rinse off, so the
scratches, as careful as I am in cleaning my polycarbonate glasses, the
scratches still aren't avoidable.
...And where I get my glasses, they charge almost DOUBLE for glass lenses.
Bill

ONLY double???

The place I went for mine wanted nearly triple the price of
polycarbonate, then an extra $70 on top of it for a "scratch-guard"
coating, *PLUS* an extra week and $40 for what they called a "drop test"
(involving some sort of "calibrated" ball bearing being dropped on each
lens from some specific height after it was completed, which they
claimed was FDA-mandated for all glass lenses) that had no guarantees of
not smashing the lenses and having to start over from sratch.

They got told to keep the glass, much as I hate the damn scratch-happy
plastic lenses.

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