Long-sightedness is to hypermetropia as short-sightedness is to :

myopia

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focusing

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astigmatism

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accomodation

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Solution

The correct option is A myopia
Long-sightedness is also called hypermetropia: Hypermetropia (long-sightedness) is a defect of an eye where a person cannot see nearby objects clearly.
Short-sightedness is also called myopia: Myopia (short-sightedness) is a defect of an eye where a person can not see distant objects clearly.

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Similar questions

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

Q. Does short-sightedness (myopia) or long-sightedness (hypermetropia) imply necessarily that the eye has partially lost its ability of accommodation? If not, what might cause these defects of vision?

(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 short 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 ?

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

Rewrite the following table so as to match second and third column with first column

Column		Column II	Column III
(1)	Myopia	Old age problem	Convex lens
(2)	Hypermetropia	Near-sightedness	Bifocal lens
(3)	Presbyopia	Long sightedness	Concave lens

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