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प्रश्न
Give Technical Term:
The adjustment of the eye in order to obtain a clear vision of objects at different distances
उत्तर
Accommodation of eye
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संबंधित प्रश्न
What do the ciliary muscles do when you are focusing on a nearby object?
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 converging power of eye-lens will be the maximum?
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.
There are two types of light-sensitive cells in the human eye:
Where are they found?
The human eye forms the image of an object at its ______.
The term " accommodation" as applied to the eye, refers to its ability to:
(a) control the light intensity falling on the retina
(b) erect the inverted image formed on the retina
(c) vary the focal length of the lens
(d) vary the distance between the lens and retina
What shape are your eye-lenses:
when you look at a distant tree?
Nocturnal animals (animals which sleep during the day and come out at night) tend to have wide pupils and lot of rods in their retinas. Suggest reasons for this.
How much is our field of view:
with one eye open?
Five persons A, B, C, D and E have diabetes, leukaemia, asthma, meningitis and hepatitis, respectively.
Which of these persons can donate eyes?
Give scientific reason:
We cannot clearly see an object kept at a distance less than 25 cm from the eye.
Choose the correct answer.
In the chemistry of vision, the photosensitive substance is _________________
Differentiate between:
Yellow spot and Blind spot.
Explain the Term: Accommodation in the eye
The innermost layer of human eye is ______.
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 |
Assertion (A): Rods and Cones are photoreceptors in the sclera of eyeball.
Reason (R): Rods are sensitive to dim light.
Name the following:
The fibres which collectively hold the lens in position.
With reference to human eye answer the question that follow:
Name the part of the eye associated with the regulation of the shape of lens.
