Go to http://grainger.com
and look at the multitudes of safety glasses. Regular, with side shields, wrap-aronds, tinted, bi-focal, polorized .. whatever you want, and you'd have to really dig to find any over $10, most are ~$5.00.
I even got a pair with integrated, retractable ear plugs in the temples.
Grainger bought Lab Safety ... which is where I started looking in the first place.