We move our eyes with the help of six muscles. The medial rectus muscle moves the eyes towards the nose. The lateral rectus muscle over the eyes towards the nose. The superior and inferior rectus muscles are responsible for upward and downward motion of the eyes. The superior and inferior oblique muscles help us to rotate the eyes.
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| Human Eye |
Sclera
Sclera is the white part of the eyeball. Sclera is the outer covering and gives shape to the eyes. It has several blood vessels that provide blood.
Iris
Iris lies behind the cornea and gives colour to the eyes. Iris can change its shape with the help of several muscles attached to it.
Pupil
Pupil circle at the centre of the iris. The pupil allows light to pass into the eye.
Retina
Retina is the innermost layer of the eye. It provides vision by sensing light with the help of rod and cone cells. Rod cells are responsible for vision in low light and cone cells are responsible for colour vision and detail.
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