High-tech specs cut out need for doctor's visit

A pair of glasses allows wearers to change their prescription, without even visiting a doctor.

"It's very cool technology, these are truly one size fits all," Dr. Christopher Starr explained to CBS This Morning. Starr is an associate professor of opthamology at Weill Cornell Medical Center.

The glasses can be adjusted from between -4.5 diopters for near-sighted assistance to +3.5 diopters for far-sighted vision. The glasses go for about $135.

"These are probably not going to win any awards at fashion week this year," he acknowledged as he held the clunky glasses. Instead, they are most useful in developing nations, where millions are blind or have reduced vision but glasses and eye doctors are sparse.

"In bifocals, you have to adjust your eyes to find the sweet spot," Weill added. "In these, the sweet spot is the whole lens."