A few years ago, I first posted about adjustable eyeglasses. Unlike the glasses you’re probably wearing right now to read this site, adjustable glasses don’t have a set prescription and instead allow the wearer to adjust the prescription as needed. This simplicity of design allows one to construct the glasses very cheaply. Medgadget has up a story about another type of these glasses that seems much simpler in design.
Image: http://www.business-opportunities.biz
