I enlisted a panel of glasses-wearers to shop on-site, test out frames and help determine the best places to buy prescription ...

Bifocal or trifocal or progressive lenses are really just multiple sets ... The full whitepaper is available online and contains details about testing, design, and construction.

Young nearsighted kids who wear bifocal contact lenses that slow uncoordinated eye growth do not lose the benefits of the treatment once they stop wearing the lenses, new research shows.