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प्रश्न
Name the muscles of the eye responsible for the power of accommodation.
उत्तर १
The ciliary muscles are responsible for the power of accommodation.
उत्तर २
The ciliary muscles attached to the lens controls its curvature and alters its focal length.
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संबंधित प्रश्न
Out of rods and cones m the retina of your eye:
which work in dim light?
Fill in the following blank with suitable words:
When light is dim, the pupil becomes................
A person walking in a dark corridor enters into a brightly lit room:
State the effect on the pupil of the eye.
Name the cells on the retina of an eye which are sensitive to (i) bright light (ii) dim light (iii) sensation of colour.
Which part brings the image into sharp focus on the retina? How does it do this?
Why does the eye-lens not have to do all the work of converging incoming light rays?
A person got his eyes tested. The optician's prescription for the spectacles reads:
Left eye: − 3.00 D
Right eye: − 3.50 D
The person is having a defect of vision called:
(a) presbyopia
(b) myopia
(c) astigmatism
(d) hypermetropia
What are the advantages of having two eyes instead of just one?
The region in the eyes where the rods and cones are located is the
With reference to the functioning of the eye, answer the question that follow:
What is the shape of the lens during near vision?
With reference to the functioning of the eye, answer the question that follow:
Name the two structure in the eye responsible for bringing about the change in the shape of the lens.
Give scientific reason:
One can sense colours only in bright light.
What is the function of iris and the muscles connected to the lens in human eye?
Give the main function of the following:
Lachrymal glands
Name the following:
The opening through which light enters the eyes.
Choose the correct answer.
In the chemistry of vision, the photosensitive substance is _________________
Choose the Odd One Out:
For the normal human eye, the near point is at ___________ cm.
Write the name.
The screen with light sensitive cells in human eye.
Write an Explanation.
Power of accommodation
We cannot distinguish colours in dim light. Explain giving suitable reasons.
A tiny mirror M is fixed on a piece of cardboard placed on a table. The cardboard is illuminated by light from a bulb. The position of eye with respect to position of bulb is shown in the figure as A, B, C and D. In which position mirror will be visible?
 |
 |
 |
 |
| (A) | (B) | (C) | (D) |
Write down the names of parts of the eye in the blank spaces shown in the figure.
The innermost layer of human eye is ______.
The change in the focal length of an eye lens in human beings is caused by the action of ______.
With reference to human eye, answer the following question.
What is blind spot?
Explain the role of the part of human eye responsible for power of accommodation of human eye.
Match the following:
|
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 accommodation |
Name the following:
The layer of the wall of the eye-ball that corresponds to the black lining of the box of a camera
