3D-printed lenses fresh (and wet) from the printer look clear, but have tiny surface imperfections ... flat side of the lens to a smooth piece of glass. Or bond the backs of two lenses together ...

Making a traditional glass lens requires a lot of experience ... Next time we’re shipwrecked on a desolate island with a handy supply of clear plastic tube and fresh water, we know we can ...

If you're interested, you can head over to the Gunnar store and pick up a pair of Tahoe glasses with Mineral Glass lenses ...

Focusing light is important for getting clear images in our eye or in photographs, because images that are not focused appear blurred. A lens is a specially shaped pieces of glass or transparent ...