Thirty patients were randomised to receive one of six lens implants including three aspheric lenses and their spherical counterparts. Pre and postoperative testing was carried out including visual ...

We’ve all seen reflection used in photography—like when a lake doubles as a mirror to the sky. For this week’s Shooting Challenge, we’re going a step more complicated and using the principles of ...

A Ball Lens consists of a highly transparent spherical ball, usually made of solid glass (fused silica) or another optical material with index of refraction less than 2. Most ball lenses are made with ...