Question

The pupil of the eye changes its size to adjust for
A. Objects at different distances
B. Different amount of light
C. Object of different sizes
D. Different colors

Answer 1

Hint: Part of the optic nerve from one eye crosses over and couples to the muscles that control the pupil size of the other eye. That's why the pupil of one eye can change when you shine the light into your other eye.

Complete step by step solution:
Eye: Visual system organs are the eyes. They give animals vision, the ability to receive and process visual detail, as well as several vision-independent photo response functions. Eyes detect and transform light in neurons into electro-chemical impulses. The eye is a complex optical system in higher organisms which collects light from the surrounding environment, regulates its intensity through the diaphragm, concentrates it in the form of an image by an adjustable lens composition, turns this picture into an electrical signal and transmits these signals to the brain through complex neural pathways which connect the eye via the optical nerve to the brain.

The eye pupil is an entry into our eyes for light rays to give us a feeling of sight. It can be dangerous to the eyes, if too much light enters our eyes. Whenever the light is strong, the student shrinks to reduce the light entry and to protect our eyes. We do not have a clear vision if too little light enters our eyes. When the light is weak, the student grows so that the light enters and the vision improves. This is how the pupil changes the size of the eye to adjust to different light levels.

Therefore, the pupil of the eye changes its size to adjust for different amounts of light.

Hence, option B is correct.

Note: The eye pupil is an entrance besides light rays into our eyes to offer us a feeling of sight. When so much light gets into our eyes, it can be harmful for the eyes. Every time the light is strong, the learner shrinks to mitigate the entry of light and protect our eyes.