Foundation
Physics Foundation
Human Eye And Colorful World
Question
What change is made in the eye to enable it to focus on objects situated at different distances? Illustrate your answer with the help of diagrams.
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Solution
To focus on distant objects, the ciliary muscles of the eye get fully relaxed and pull the suspensory ligaments attached to the eye-lens tightly. This, in turn, stretches the eye-lens and the eye-lens becomes thin.
To focus on nearby objects, the ciliary muscles of the eyes contract and make the suspensory ligaments loose. The ligaments then stop pulling the eye-lens. The eye-lens bulges under its own elasticity and becomes thick.
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