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Question of 73

Q.Match the List I with List II :
List I: (A) Myopia (B) Hypermetropia (C) Presbyopia (D) Astigmatism
List II:

(1) Bifocal lens
(2) Cylindrical lens
(3) Concave lens
(4) Convex lens
(a) (A)-(3), (B)-(4), (C)-(1), (D)-(2)
(b) (A)-(2), (B)-(3), (C)-(2), (D)-(1)
(c) (A)-(1), (B)-(2), (C)-(3), (D)-(4)
(d) (A)-(4), (B)-(3), (C)-(2), (D)-(1).
Himachal HpboseHPBOSE Plus Two Board 2023MCQ· 1mImportance★★★★★
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Myopia is corrected with a concave lens, hypermetropia with a convex lens, presbyopia with a bifocal lens, and astigmatism with a cylindrical lens.

  • (A) Myopia (near-sightedness): the eyeball is too long / eye lens too converging, so distant objects focus in front of the retina. Corrected with a diverging (concave) lens →\to (3).
  • (B) Hypermetropia (far-sightedness): the eyeball is too short / eye lens too weak, so near objects focus behind the retina. Corrected with a converging (convex) lens →\to (4). …

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