It's true about the curved lenses not working well with strong prescriptions, my husband had the same issues before he developed cataracts and his natural lenses were replaced with Toric artificial lenses.
Prior to that, he had a pair of prescription racketball goggles that he used for cycling, as well as a pair of traditional sunglasses with big flat lenses. His eyes are sensitive to wind, to he preferred the racketball goggles for most riding.
Now he has 20/13 vision in one eye and 20/15 in the other and can ride without a prescription. He's been buying sunglasses off the rack and really enjoying being able to do that.
e.t.a.: Here's a solution that I sometimes see on site visits. We're supposed to be using the special safety glasses with the dust gaskets that the client specifies for their minesites, but sometimes I see people using these add-on side shields for their regular prescription glasses:
http://www.northernsafety.com/News/A...-safety-device



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