July 2010, Eye care

Learn about Bifocal lenses & Presbyopia

What are bifocal lenses? Who should use them? How to chose them? Bifocals are not a new invention. They were actually invented by Benjamin Franklin who realized that he was constantly removing and replacing his glasses to adjust his vision, when alternately looking at faraway objects and reading small print. He devised a lens that would let him clearly see both near and far objects, by simply cutting two pairs of different prescription spectacles in half and using half of each lens for each eye. Technology has come a long way since Franklin's day...

By Mancunian

Martin Loughlin is originally from the UK, but now lives in beautiful North Carolina. He has almost 17 years of experience in the travel industry, although his real passion is writing. He has been published on numerous web sites, as well as in print. He prefers to write about travel, but has tackled everything from dust mites to industrial accidents.