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Visual Defects

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Question

Name the kind of lens required to correct myopia

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Solution

Myopia is also known as nearsightedness, in this defect a person has a problem while seeing the far object.
The concave lens helps to cure myopia by focusing an image on the retina.
Placing concave lenses in front of a nearsighted eye reduces the refraction of light and lengthens the focal length so that the image is formed on the retina.

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Similar questions

Q. (a) What is myopia?
(b) What are the causes of myopia?
(c) Draw three labelled ray-diagrams to show the defect of vision called myopia and how it is corrected by the use of lenses.
(d) The far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the defect?

Q. Which lens is used to correct myopia−convex or concave?

Q. Name the following:
The kind of lens required to correct near sightedness

Q. What kind of lens is used to rectify myopia?

Q. Name the type of lens which is used to correct?
i) Myopia ii) Hypermetropia.

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