Eyesight is one of man’s most precious possessions and to lose it totally, or even partially, is indeed a tragedy. Before we consider the care of the eyes and preservation of eyesight, let us examine the Structure and Functions of the eye.

Structure and Functions of the Eyes.

The eye can be compared to the camera and its component parts. The refractive system of the eye via cornea and lens, correspond to the lens of the camera.

The iris and the pupil correspond to the diaphragm and its variable aperture, in the camera. The retina corresponds to the photographic film of the camera.

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