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When is a person said to have developed ...

When is a person said to have developed cataract in his eye ? How is the vision of a person having cataract restored ?

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LAKHMIR SINGH & MANJIT KAUR-THE HUMAN EYE AND THE COLOURFUL WORLD -Exercise
  1. A person suffering from the eye-defect myopia (short-sightedness) can ...

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  2. What is presbyopia ? Write two causes of this defect. Name the type of...

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  3. When is a person said to have developed cataract in his eye ? How is t...

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  4. Fill in the following blanks with suitable words : A person is short...

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  5. The human eye can focus objects at different distances by adjusting th...

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  6. The defect of vision which cannot be corrected by using spectacles is ...

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  7. A person cannot see the distant objects clearly (though he can see the...

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  8. Though a woman can see the distant objects clearly, she cannot see the...

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

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

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

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

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

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

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

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

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

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

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

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

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