I bought eyeglasses with lenses that darken in the sunshine, now they hardly change and this is only a year and a half. What are these transitions lenses called? Where can buy cheap transitions lenses? Thanks a lot!

Transitions lenses are also called Photochromic lenses. My colleague bought a pair of photochromic eyeglasses at a cheap price last week from an online optical store PrescriptionGlassesOnline.net as this store offers special Christmas Shopping Event now, there are many cheap eyeglasses frames can be choosed. You may get on PrescriptionGlassesOnline.net and have a look.