Computer glasses as safety glasses?

When woodworking everything is about 2 or 3 feet away from me, which is kind
of a bad distance with progressive lenses; but nothing is further away than
10'.

I asked my eye doctor to give me a prescription where the base was stronger
and the add was stronger, figuring that would help me at the distance I need
them for. He said I should get computer glasses. I told him I couldn't
stand polycarb and trivex wasn't available in a computer glass. He told me
that plain plastic was plenty strong; I should just ask the optician to make
them thicker than normal.

Does that make sense?
I have read that 1.67 has better impact resistance than CR-39. Would that
be enough better a choice to justify the way higher price?

BTW, when I was here a year ago it didn't have all this spam. Is there
someplace better to go for help like this?

 

You probably should post your Rx. 1.67 may have better impact resistance
than CR-39 for the same thickness of lens, but it will be a lot thinner for
a given Rx.

You don't have to purchase a lens designated as a Computer Lens by the lens
manufacturer. In theory and progressive with the correct Rx can be used as a
computer lens. Certain progressive lens designs are more amenable to this
than others. Robert Martellaro of Roberts Optical is a very knowledgeable
optician who posts here and could probably help you with finding a good one
(and maybe even one that comes in Trivex)..

 

Prescription is +2 sph, +2.25 add.
Thanks

 

Since you are farsighted, your lenses will be thicker in the middle than the
sides, and you don't need to worry quite so much about impact resistance. A
nearsighted person with a high index lens would have a lens that is very
thin at the center.

 

The lens doesn't have to be thick to be impact resistant. Get the
least expensive ones you can see with. I've used thin plastic safety
glasses doing all kinds of wood working with zero problems with them.