Human eye
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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.
The eye of the right side of the face, showing its visible components - a white sclera, a green iris, and the black pupil, in its orbit surrounded by the lids and lashes
A detailed medical illustration of the eye
MRI scan of the human eye
Eye and orbit anatomy with motor nerves
Sclera
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The sclera, also known as the white of the eye or, in older literature, as the tunica albuginea oculi, is the opaque, fibrous, protective outer layer of the eye containing mainly collagen and some cru
Human eye
…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…
Goat eye with relatively dark sclera and horizontal pupil
Cow eye with dark sclera
Rare whites in a western lowland gorilla