This is just a quick hit, because I needed to look this up myself today.
People that wear prescription glasses sometimes have this problem - after a couple of different sets, you have a stack of glasses you will never wear again. What do you do with them? They were costly, you do not want to throw them away. You hold on to your most recent old pair, in case your current ones break - or at least I do, having run into that before! But the rest? Especially if you are part of a family of glasses-wearers, they can stack up.
Well, there are plenty of people that can use your old glasses!
There are several organizations with many, many drop off locations for your used glasses. Some also take sunglasses or non-prescription reading glasses. So if you have old glasses, give them to a organization that will get them to people that need them locally to globally.
New Eyes for the Needy
I am taking our old glasses to a library in Indianapolis, as they collect for the Lion's Club and we visit our neighborhood library often.
If you know of other places that take eyeglasses donations, please leave their information in a comment. Thank you!