Viture's new smartglasses cost $299 and weigh less than a tennis ball

Viture's Pro 2 smartglasses cost $299 and weigh just 63 grams — 20 percent lighter than the original. Tiny Sony screens inside show 1080p video to each eye at a smooth refresh rate. A built-in dial lets you adjust the focus for each eye, so glasses wearers skip costly prescription add-ons.