A camera lens filter is pretty much what you’d expect: it’s a physical piece of glass that attaches to your camera’s lens, filters the light before it reaches the sensor and, typically, has an effect ...

Dr. Colby answers the question: 'What Is Monovision And How Does It Work?' Aug. 24, 2009— -- Question: What is monovision, how does it work, and won't it be uncomfortable to wear two different ...

“In optics, there was a problem,” says Amit Agrawal, a physicist at the National Institute of Standards and Technology in Gaithersburg, Md. If you wanted to focus a single lens to two different points ...

Scientists have developed a new type of lens that creates multiple focal points, which could make for glasses or contacts that provide a clearer view over a range of distances. The secret? Making the ...