Which of the following statements best describes how the power of accommodation enables the human eye to focus on both near and distant objects?
The eye lens changes its focal length by altering its shape through ciliary muscle action
The power of accommodation refers to the eye's ability to adjust its focal length to see objects clearly at varying distances.
Mechanism:
- The eye lens is flexible and surrounded by ciliary muscles.
- When viewing a nearby object: ciliary muscles contract → lens becomes thicker → shorter focal length → increased converging power.
- When viewing a distant object: ciliary muscles relax → lens becomes thinner → longer focal length → decreased converging power.
This process is called accommodation. The cornea provides a fixed refracting power; only the lens adjusts.
Similar Questions
Which of the following statements best describes how the power of accommodation enables the human eye to focus on both near and distant objects?
Which of the following statements best describes how the power of accommodation enables the human eye to focus on both near and distant objects?
Which of the following statements best describes how the power of accommodation enables the human eye to focus on both near and distant objects?
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