Learn about refraction, ray diagrams and how convex lenses bend light rays with this guide for KS3 physics students aged 11-14 from BBC Bitesize.

A refraction test is given as part of a routine eye examination. This test tells your eye doctor what prescription you need in your glasses or contact lenses.

Two laser pointers were attached to the blackboard, and an elderly person demonstrated the effects of concave and convex lenses on light using both reading glasses and bifocals. This footage was ...

Researchers from the University of Jena, Germany, have developed an optical lens just a few millimeters in size whose light refraction behavior changes when gas is present.. As the researchers report ...

Refraction is the bending of light rays. Normally, light travels in a straight line, and changes direction and speed when it passes from one transparent medium to another, such as from air into glass.

NASHVILLE, Tenn. — Successful multifocal contact lens fitting starts with a good refraction, an industry executive said here at Optometry’s Meeting. Half of presbyopic contact lens wearers ...

The Light Adjustable Lens performs well in post-RK eyes, with good results that remain relatively stable over time, according to one presenter.“In post-RK eyes, IOL power is even tougher to ...