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प्रश्न
What are the advantages of having two eyes instead of just one?
उत्तर
The following are the advantages of having two eyes.
1. Having two eyes instead of one gives us a wider field of view. With one eye, our field of view is only about 150o, but with two eyes, our field of view increases to 180o.
2. Having two eyes instead of one gives us an accurate judgement of the distance of an object. As our eyes are a few centimetres apart from each other, each eye focusses on the same object at different angles and sends two slightly different images to the brain. The job of the brain is to combine these two images and form an accurate three-dimensional image of the object.
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संबंधित प्रश्न
Distinguish between: aqueous humor and vitreous humor
Out of rods and cones m the retina of your eye:
which work in dim light?
Explain the functions of the following parts of the eye:
(i) cornea
(ii) iris
(iii) pupil
(iv) ciliary muscles
(v) eye-lens
Give the main function of the following:
Three semicircular canals
Sketch and label V.S. of a human eye.
Draw a diagram of the human eye as seen in a vertical section and label the parts which suit the following descriptions relating to the:
(i) photosensitive layer of the eye.
(ii) structure which is responsible for holding the eye lens in its position.
(iii) structure which maintains the shape of the eyeball and the area of no vision.
(iv) anterior chamber seen in front of the eye lens.
(v) outermost transparent layer seen in front of the eyeball.
Mention, if the following statement is True or False
Cones are the receptor cells in the retina of the eye sensitive to dim light.
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 | Hypermetropoia | e | Power of accomodation |
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 |
Write the main functional activity of the following structure.
Ciliary body and suspensory ligament
