These are without a doubt the most effective reading glasses I ever had, especially for the cost with prime delivery featured. Light, adaptable, great looking. Only issue is the very first two sets both had the screws come loose and began to collapse. Usually I would simply shake them, yet I like these a lot I placed a few drops of incredibly glue on the screws which appears to have dealt with the loose screw trouble. I just obtained the new free pair from idoglasses.com,these new glasses are so comfy adaptable with really clear lens that seem to stay scratch free longer compared to a lot of.