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प्रश्न
Differentiate between:
Myopia and Hypermetropia.
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उत्तर
| Myopia | Hypermetropia |
| The lengthening of the eyeball or the lens is too curved causes this defect. | The shortening of the eyeball or flattening of the eye lens causes this defect. |
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संबंधित प्रश्न
A person with a myopic eye cannot see objects beyond 1.2 m distinctly. What should be the type of the corrective lens used to restore proper vision?
Name the defect of vision in a person:
whose near point is more than 25 on away.
Which defect of vision can be rectified:
by using a concave lens?
A man can read the number of a distant but clearly but he finds difficulty in reading a book.
From which defect of the eye is he suffering?
The defect of vision in which the eye-lens of a person gets progressively cloudy resulting in blurred vision is called:
(a) myopia
(b) presbyopia
(c) colourblindness
(d) cataract
You do not enjoy watching a movie from a very short distance from the screen in a cinema hall. Why?
List two causes of presbyopia. Draw labelled diagram of a lens used for the correction of this defect of vision.
Anuja cannot see the blackboard writing but she can see nearby things.
(a) What is the eye defect she is suffering from?
(b) State the possible reason for her defect.
(c) How is it corrected
Solve the following question:
The near point of the eye of a person is 50 cm. Find the nature and power of the corrective lens required by the person to enable him to see clearly the objects placed at 25 cm from the eye?
Observe the figure whether it is correct or not and explain the phenomenon.
