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Standard X

Physics

Defects of Vision and Their Correction

Match the col...

Question

Match the columns:
i. convex lens a. presbyopia
ii. concave lens b. cataract
iii. Artificial lens c. myopia
iv. focal lens d. hypermetropia

i-c,ii-d,iii-a,iv-b

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i-d,ii-c,iii-b,iv-a

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i-b,ii-c,iii-a,iv-d

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i-a,ii-b-iii-d,iv-c

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Solution

The correct option is A i-d,ii-c,iii-b,iv-a
Myopia ,near sightedness is corrected by concave lens.
Hypermetropia or, far sightedness is corrected by convex lens.
In cataract natural faulty lens is replaced by artificial lens.
Bi-focal lens is used in presbyopia which generally occurs in old persons.

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i. convex lens	a. presbyopia
ii. concave lens	b. cataract
iii. Artificial lens	c. myopia
iv. focal lens	d. hypermetropia

Match the columns:i. convex lens a. presbyopiaii. concave lensb. cataractiii. Artificial lensc. myopiaiv. focal lensd. hypermetropia

The correct option is A i-d,ii-c,iii-b,iv-aMyopia ,near sightedness is corrected by concave lens.Hypermetropia or, far sightedness is corrected by convex lens. In cataract natural faulty lens is replaced by artificial lens.Bi-focal lens is used in presbyopia which generally occurs in old persons.

Match the columns:
i. convex lens a. presbyopia
ii. concave lens b. cataract
iii. Artificial lens c. myopia
iv. focal lens d. hypermetropia