The site makes it look like exclusively a charity? I can donate and that means someone gets glasses. But can I buy them for myself or a friend as well? I couldn't find the answer (on mobile)
[1]: http://www.onedollarglasses.org/the-glasses/production-on-si...
then it could spread and be self-sustaining, and everywhere would have $2 glasses, which is actually somewhat affordable, even in developing countries.
My only other concern is what about astigmatism? Are they teaching the people that distribute it to accomodate for that (like "2 hour optometrist training" LOL)