Believe it or not, J.C. Penney's! The best selection (even designer frames), sales help and prices - they always have special deals going. Also ask for AARP or AAA discounts or if your health insurance has a deal with them - most do.

Earlier this year I got two pairs, ultra thin, high-index lenses for about $600, which is cheap. I bought the warranty as I'm going through a lot of eye issues this year. They have changed the prescription for me once already at no cost. I'm seeing my eye doc tomorrow for a new reading lens Rx; with the "warranty" I'll only pay 10% of their cost for changing the lenses.

I get the glasses with the polarized clip on (actually magnetic stick on) sunglasses, That way I don't have to pay for yet another pair; my regular glasses become my sunglasses with a quick stickon.