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?
Important Questions from Biology
- List-I with List-II:
List-I
(Terms)List-II
(Explanations)A. Biohazards I. Single celled living organism B. Bacteria II. Most lethal ultra microscopic inert infectious agents C. Viruses III. Organisms which live in or on another living organisms D. Parasites IV. Hazards related to disease in plants, animals and humans
Choose the correct answer from the options given below : - Malarial parasite shows which type of asexual reproduction?
- Which of the following is NOT a characteristic feature of epithelial tissue?
- Select the option that shows the correct age range of puberty in human male and female.
- Which of the following is the most abundant protein in the biosphere?
