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After testing the eye of a child, the op...

After testing the eye of a child, the optician has prescribed the following lenses for his spectacles :
Left eye : + 2.00 D `" "` Right eye : + 2.25 D
The child is suffering from the defect of vision called :

A

Short-sightedness

B

long-sightedness

C

cataract

D

presbyopia

Text Solution

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The correct Answer is:
B
NA
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LAKHMIR SINGH & MANJIT KAUR-THE HUMAN EYE AND THE COLOURFUL WORLD -Exercise
  1. Though a woman can see the distant objects clearly, she cannot see the...

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  2. A young man has to hold a book at arm's length to be able to read it c...

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  3. After testing the eye of a child, the optician has prescribed the foll...

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  4. A student sitting on the last bench in the class cannot read be writin...

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  5. A man driving a car can read a distant road sign clearly but finds dif...

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  6. The defect of vision which the eye-lens of a person gets progressively...

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  7. A person cannot see distant objects clearly. His vision can be correct...

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  8. A person finds difficulty in seeing nearby objects clearly. His vision...

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  9. In a certain murder investigation, it was important to discover whethe...

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  10. The near point of a long-sighted person is 50 cm from the eye. (a) C...

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  11. A person can read a book clearly only if he holds it at an arm's lengt...

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  12. How much is our field of view : (a) with one eye open ? (b) with b...

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  13. Fill in the following blanks with suitable words : (a) Having two ey...

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  14. What are the advantages of having two eyes instead of just one ?

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  15. Explain clearly why, a person who has lost the sight of one eye is at ...

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  16. Name two animals having eye : (a) on the sides of the head. (b) at...

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  17. With both eyes open, a person's field of view is about :

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  18. Having two eyes gives a person :

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  19. As light rays pass from air into a glass prism, are they refracted tow...

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  20. As light rays emerge from a glass prism into air, are they refracted t...

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