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प्रश्न
Explain the role of the part of human eye responsible for power of accommodation of human eye.
उत्तर
The role of the ciliary muscles in the human eye, responsible for the power of accommodation, is to adjust the curvature of the eye lens. This adjustment allows the eye to focus on objects at different distances. When the ciliary muscles contract, the lens becomes thicker, decreasing its focal length to focus on near objects. Conversely, when the muscles relax, the lens becomes thinner, increasing its focal length to focus on distant objects. This process enables clear vision across a range of distances.
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संबंधित प्रश्न
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.
Describe the working of the human eye with the help of the above diagram.
Out of animals of prey and predators, which have their eyes:
on the opposite sides of their head?
With both eyes open, a person's field of view is about:
(a) 90°
(b) 150°
(c) 180°
(d) 360°
The animals called predators have:
(a) both the eyes on the sides
(b) one eye on the side and one at the front
(c) one eye on the front and one at the back
(d) both the eyes at the front
Correct and rewrite the statements by changing the biological term that is underlined for the statement:
The part of the eye which can be donated from a clinically dead person is the Retina.
Answer the following question.
Write the structure of eye lens and state the role of ciliary muscles in the human eye.
With reference to human eye, answer the following question.
What is aqueous humor?
| Column I | Column II | ||
| 1 | Retina | a | Path way of light |
| 2 | Pupil | b | Far point comes closer |
| 3 | Ciliary muscles | c | near point moves away |
| 4 | Myopia | d | Screen of the eye |
| 5 | Hypermetropia | e | Power of accomodation |
Differentiate between members of the following pair with reference to what is asked in the bracket.
Aqueous humour and vitreous humour (location).
