In a ray diagram, a concave lens is drawn as a vertical line with inward facing arrows to indicate the shape of the lens.

Getting light to hit our retinas depends on different parts of the eye working together. First, the light goes through the ...

Convex and concave lenses can both be used ... This is corrected by using a concave or a diverging lens. People who are ‘long sighted’ can see distant objects clearly, but they cannot clearly ...