Convex and concave lenses can both be used to correct defects of vision. The most commonly occurring defects of vision are ‘short sightedness’ and ‘long sightedness’. People who are ‘short sighted’ ...

Optical Surfaces Ltd has supplied several sets of ultra-high quality plano-convex lenses to the MAX IV Laboratory to function as key focusing elements in diagnosing the beam in their state-of-the-art ...