The shape of a cornea can be measured and represented by color-coded maps in several ways. A number of different dioptric intervals has been used for color-coded maps and most topographers offer ...

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 ...

Patients who previously underwent LASIK and are now experiencing age-related vision changes have a new path forward. In its latest educational article, Can I Get Refractive Lens Exchange if I’ve Had ...

Scientists have demonstrated that negative refraction can be achieved using atomic arrays -- without the need for artificially manufactured metamaterials. Scientists have long sought to control light ...