GK
HUMAN BODY AND REPRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Convex lens
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Concave lens
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Convex-concave lens
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Concave-convex lens
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Detailed explanation-1: -In a myopic eye, the image of a distant object is formed in front of the retina and not at the retina itself. A concave(diverging) lens causes light rays to diverge before they strike the lens of the eye so that the image is formed on the retina. Hence, a concave lens is used to correct myopia.
Detailed explanation-2: -Concave Lenses Are for the Nearsighted, Convex for the Farsighted. Concave lenses are used in eyeglasses that correct nearsightedness. Because the distance between the eye’s lens and retina in nearsighted people is longer than it should be, such people are unable to make out distant objects clearly.
Detailed explanation-3: -A myopic defect can be corrected by using a concave lens of suitable power. In a myopic eye the image is formed in front of the retina so a diverging lens is used to shift the image to the retina.