These glasses are worthy of holding your favorite alcohol and pounding down on a table. And if anything, they’re sure to start a conversation at that next house party. —Collapsible key chain ...

Prism glasses use refraction, which means they bend light to change its direction before it meets the eye. If someone has double vision, prism glasses can redirect where light meets the eye ...

A refraction test is usually given as part of a routine eye examination. It may also be called a vision test. This test tells your eye doctor exactly what prescription you need in your glasses or ...