Sclera (white portion of the eye) is the outer sheath of the eyeball. Sclera protects the eye from damage as it is the toughest pigmented fibrous coat of the eye. Sclera consists of an inner circular muscle and an outer radial muscle. Sclera controls the amount of light entering the eye. The cornea is the transparent outermost layer of the eye. It is also referred as a transparent ‘window’. It is the main part through which light enters the eye.
Sclera and Cornea
