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प्रश्न
With reference to the functioning of the eye, answer the question that follow:
What is the shape of the lens during near vision?
उत्तर
When you are looking at a near object, the lens needs to become more rounded at the central surface in order to focus the light rays
संबंधित प्रश्न
Explain the mechanism of vision.
What kind of lens is present in the human eye?
Name the part of the retina which is insensitive to light.
Fill in the following blank with suitable word:
The iris controls the amount of................entering the eye.
The eyes of a person are focused (i) on a nearby object, and (ii) on a distant object, turn by turn. In which case:
the focal length of eye-lens will be the maximum?
If you walk from a dark room into sunlight and back again into dark room, how would your pupils alter in size? What makes this happen?
Which part brings the image into sharp focus on the retina? How does it do this?
State whether the following statement is true or false:
Rabbit has eyes which look sideways.
The region in the eyes where the rods and cones are located is the
What is the function of iris and the muscles connected to the lens in human eye?
Label the following diagram :
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.
Match the following:
| Column - I | Column - II |
| 1. Retina | a. Pathway 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 | f. Power of accommodation |
Write in proper sequence the names of all the parts of the human eye through which the light rays coming from an object pass before they form an image on the retina.
Name the following:
Place of best vision in the retina of the eye.
Name the following:
The fibres which collectively hold the lens in position.
Give reason:
Blind spot is considered as 'area of no vision'.
With reference to human eye answer the question that follow:
Name the part of the eye associated with the regulation of the size of pupil.
