An 8 gram, 110 mAh battery powers the prototype for roughly 6 hours. Eyeglasses that can adapt on the fly to different focal needs is important because many people with degraded vision suffer ...

Polycarbonate shields (or wire face guards): Used, for example, in baseball and softball (batting), and football Don't wear your everyday eyeglasses during sports. They aren’t as safe.

Prescription eyeglasses can cost as much as $1,000, and most have plastic lenses, which scratch more easily than glass. Clearly, you need to protect your investment. But should you clean lenses ...