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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
About 45 lac people in the developing countries are suffering from corneal blindness. About 30 lac children below the age of 12 years suffering from this defect can be cured by replacing the defective cornea with the cornea of a donated eye. How and why can students of your age involve themselves to create awareness about this fact among people?
Explain two possible reasons of myopia. How can it be corrected? Explain with a suitable diagram.
Name any two defects of vision which can be corrected by using spectacles.
Though a woman can see the distant object clearly, she cannot see the nearby objects clearly. She is suffering from the defect of vision called:
(a) long-sight
(b) short-sight
(c) hind-sight
(d) mid-sight
To read a book held at a distance of 25 cm, will she need converging or diverging spectacle lenses?
List two causes of presbyopia. Draw labelled diagram of a lens used for the correction of this defect of vision.
Give Reason:
Older people require glasses to read and write.
Mention, if the following statement is True or False
Hypermetropia is a defect of the eye caused due to the eyeball elongation
Choose the Odd One Out:
A person cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using a lens of power:
