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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
Write the function of the following part of the human eye: crystalline lens
Draw a neat and labelled diagram of the structure of the human eye.
What is the least distance of distinct vision for a normal human eye?
What is the:
far point of a normal human eye?
Name the cells on the retina of an eye which are sensitive to (i) bright light (ii) dim light (iii) sensation of colour.
Mention if the following statement is true (T) or false (F) Give reason.
Ciliary muscles regulate the size of the pupil
Define the following:
Yellow spot
What is meant by power of accommodation of the eye?
Explain the structure and functioning of Human eye. How are we able to see nearby as well as distant objects?
| 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 |
