if you do not need eyeglasses then consider yourself lucky.
if you are like me and need them then why not put them to use for other things than seeing properly
like here for instance. eyeglasses make nice shadows especially when the sun is low as it was the evening took this shots.
so no need to throw out old ones that no longer give proper vision.i'm not sure what else they can be used for so if you have any suggestions please let me know