Here's how an innovative flat lens could solve these problems for satellites and space-based telescopes. Understanding Telescopes and the Limitations of Lenses . Lenses, the funda ...

Sunglasses-makers now offer myriad lens colors to choose from, but you shouldn’t pick based only on style. The different lens colors provide ­different benefits depending on how and where you boat. We ...

We spent a full year testing nearly 40 X-mount lenses to figure out which ones make the most sense for Fujifilm shooters.

Lenses can also suffer from a malaise known as chromatic aberration, in which different wavelengths of light are refracted to slightly different degrees so that different colors come to focus at ...

Whether you prefer dailies or monthlies, have astigmatism, or tend to get dry eyes, here are the best contact lenses according to an optometrist.