Eyes biography

Sensory organ of vision

This article is about the eyes of humans. For eyes in general, see Eye. For other uses, see Eye (disambiguation).

This article uses anatomical terminology.

The human eye is a sensory organ in the visual system that reacts to visible light allowing eyesight.

Other functions include maintaining the circadian rhythm, and keeping balance.

Saint lucy patron saint of eyes biography

The eye can be considered as a living optical device. It is approximately spherical in shape, with its outer layers, such as the outermost, white part of the eye (the sclera) and one of its inner layers (the pigmented choroid) keeping the eye essentially light tight except on the eye's optic axis.

In order, along the optic axis, the optical components consist of a first lens (the cornea—the clear part of the eye) that accounts for most of the optical power of the eye and accomplishes most of the focusing of light from the outside world; then an aperture (the pupil) in a diaphragm (the iris—the coloured part