Question

Match the following parts of the eye with it's function or it's characteristic feature.

• A. Carries signal to brain
• B. Regulates light entry
• C. Maximum photoreceptors
• D. Refracts light

Answer 1

The optic nerve is a bundle of neural fibers that transmits signal from the retina to the brain.

Iris is the coloured part around the pupil. The adjustment of the pupil regulates the amount of light entering the eye.

Fovea centralis is a point that contains maximum number of sensory cells and particularly the cones. As a result, this is the region of brightest vision.

The vision process relies heavily on the ability of the eye to refract light. This takes place at both the cornea and the lens of the eye. Since the cornea has a spherical surface, it acts like a converging lens. As light rays hit the cornea, the light is refracted.