You can still use old eyeglasses, by installing an updated prescription in them, as readers or sunglasses or regular eyeglasses through the Eyeglasses.com Replacement Lenses service.

The Lions Club has just given me a certificate for bringing them 600 pair of glasses donated by my workplace and our library...

I found that the local Walmart eyeglass office has a collection box for used glasses. Just call around or ask your optomitrist if they recycle. Lion's club even recycles what they cannot reuse, so you can feel better that they are not going to the landfill.

So many good suggestions here, both in the article and the comments! :) Our public library has Lions' Club boxes available to accept donations. Very convenient!

If you get metal frames, instead of the ugly plastic ones that break and crack in the wintertime, you can just order new lenses when you need a new prescription. It's also good to have a couple extra pairs of your last prescription, because you can keep the spare pair in your car's glove compartment, and one at your desk at work, in case your current pair gets broken.