Magic bifocals

…The University of Arizona has invented some self-adjusting glasses. Electricity is delivered in doses to liquid crystal film, changing the correction.

…The result? Automatic focus!

…Good news for bifocal wearers—93% of those over 45.

…The wearer’s distance prescription is ground in, then the electricity adjusts the focus for near-in viewing.

…Right now, they look like Mr Wizard’s safety glasses. But in two years, scientists predict, they will be de-geekified and will sweep the market.