On Wed, 23 Jun 2010 13:16:51 -0500, sam wrote:

I'm looking for safety glasses where the entire lens is a 2.0 reading
glass, not a bifocal. I tried the bifocal but it's hard to use when I'm
working on something above my head.

Why not just put the book in your lap? Then you won't be dropping it on
your head, so you won't need safety glasses either.