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Myopia and Its Cure

Fill in the b...

Question

Fill in the blacks with the correct words to make true statements:
Near sightendness and far sightedness happen when light is not focussed on the ...............

A

retina

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B

cornea

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C

pupil

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D

lens

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Solution

The correct option is A retina
Nearsightedness results in blurred vision when the visual image is focused in front of the retina, rather than directly on it.

Farsightedness is the result of the visual image being focused behind the retina rather than directly on it.

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Similar questions

Q. Fill up the blanks:
a) light sensitive screen of human eye..............
b) near sightedness is corrected by..................
c) hypermetropia is corrected by.................
d) range of vision for a normal eye............

The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This is due to

(a) presbyopia

(b) accommodation

(c) near-sightedness

(d) far-sightedness

Q. What is the scientific name for:

(a) near-sightedness

(b) far-sightedness

Q. A person is suffering from both near sightedness and far sightedness. His spectacles would be made of

Q. (a) What is long-sightedness? State the two causes of long-sightedness (or hypermetropia). With the help of ray diagrams, show:
(i) the eye-defect long-sightedness.
(ii) correction of long-sightedness by using a lens.

(b) An eye has a near point distance of 0.75 m. What sort of lens in spectacles would be needed to reduce the near point distance to 0.25 m? Also calculate the power of lens required. Is this eye long-sighted or short-sighted?
(c) An eye has a far point of 2 m. What type of lens in spectacles would be needed to increase the far point to infinity? Also calculate the power of lens required. Is this eye long-sighted or short-sighted?

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