I was going to second the WalMart idea.... but see you don't have vision centers in yours. In my experience (Olean, NY), they've been extremely professional, took their time, and I've gotten the best pairs of glasses in my life from there.... I wish I had gone there years ago. What prompted the change from my Sterling Optical was a "you'll get used to them." Quick research showed that my prescription was *NOT* recommended in a polycarbonate lens because of the exact problem I was having.
I'm in the same boat as you... have to use the $$ by a certain date... I get prescription sunglasses, swimming goggles, snorkeling mask, polarized prescription sunglasses, etc. to use up the money.