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Which defect of vision can be rectified ...

Which defect of vision can be rectified :
(a) by using a concave lens ?
(b) by using a convex lens ?

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LAKHMIR SINGH & MANJIT KAUR-THE HUMAN EYE AND THE COLOURFUL WORLD -Exercise
  1. Name one of the common defects of vision and the type of lens used to ...

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  2. Name the defect of vision in a person : (a) whose near point is more...

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  3. Which defect of vision can be rectified : (a) by using a concave len...

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  4. What type of lens is used to correct (a) hypermetropia (b) myopia ?

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  5. What is the other name of (a) myopia (b) hypermetropia ?

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  6. What is the scientific name of (a) short-sightedness, and (b) long-sig...

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  7. What kind of lens is used to correct (a) short-sightedness (b) long-s...

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  8. State whether the following statement is true or false : Short-sight...

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  9. Name the defect of vision in which the eye-lens loses its power of acc...

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  10. Name the defect of vision which makes the eye-lens cloudly resulting i...

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  11. What is the other name of old age hypermetropia ?

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  12. Name any two defects of vision which can be corrected by using spectac...

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  13. Name one defect of vision (or eye) which cannot be corrected by any ty...

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  14. What is the far point of a person suffering from hypermetropia (or sho...

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  15. Where is the near point of a person suffering from hypermetropia (or l...

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  16. A man can read the number of a distant bus clearly but he finds diffic...

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  17. A student sitting in the last row of the class-room is not able to rea...

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  18. Complete the following sentences : (a) A short-sighted person cannot...

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  19. What are the two most common defects of vision (or defects of eye) ? H...

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  20. Differentiate between myopia and hypermetropia. What type of spectacle...

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