Academic

HMM: Scratched glasses give perfect vision for any eyesight. ?Ditch those bifocals. You might soon?

By Glenn Reynolds

HMM: Scratched glasses give perfect vision for any eyesight. “Ditch those bifocals. You might soon wearing spectacles whose lenses allow you to see clearly regardless of how long or short-sighted you are. . . . Zeev Zalevsky at Bar-Ilan University in Ramat Gan, Israel, has developed a technique to turn a standard lens into one that perfectly focuses light from anything between 33 centimetres away and the horizon. It involves engraving the surface of a standard lens with a grid of 25 near-circular structures each 2 millimetres across and containing two concentric rings. The engraved rings are just a few hundred micrometres wide and a micrometre deep. ‘The exact number and size of the sets will change from one lens to another,’ depending on its size and shape, says Zalevsk.”

Full post as published by Instapundit.com on October 07, 2010 (boomark / email).