New "automatic" bifocal lense designed

[Cap'n Refsmmat]

A new bifocal lense prototype can change its focus automatically with a simple electric charge, leading to the hopes that bifocal users won't have to strain their eyes with the cumbersome dual-lense glasses anymore.

 

Current bifocals combine two lenses into one piece of plastic, so that when users look down they look into a lense that lets them read and see close-up. However, this combination of lenses can cause diziness or headaches. The new prototype can change to close or far vision with the flick of a switch, and scientists are hoping to make it even fully automatic as well.

 

http://physicsweb.org/articles/news/10/4/2/1