Explain the structure and functioning of the human eye. How are we able to see nearby as well as distant objects?
Cornea: A thin membrane through which light enters the eye, maximum refraction occurs at the outer surface of cornea. Iris: A dark muscular membrane which controls size of pupil. Pupil: Regulates and controls the amount of light entering the eye. Eye lens: Composed of fibrous, jelly like material, with adjustable curvature, forms an inverted and real image of object at retina. Retina: It is a light sensitive screen on which image is formed. The power of accommodation, that is, the ability of the eye lens to adjust its focal length, help us to see near and far objects clearly.
