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# 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 problem? - CBSE Class 10 - Science

ConceptRefraction at Spherical Surfaces and by Lenses Power of a Lens

#### Question

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 problem?

#### Solution

The person is suffering from an eye defect called myopia. In this defect, the image is formed in front of the retina. Hence, a concave lens is used to correct this defect of vision.
Object distance, u = infinity = ∞
Image distance, v = – 80 cm
Focal length = f
According to the lens formula,

A concave lens of power – 1.25 D is required by the person to correct his defect.

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#### APPEARS IN

NCERT Solution for Science Textbook for Class 10 (2019 to Current)
Chapter 11: The Human Eye and the Colourful World
Q: 6 | Page no. 198
Solution 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 problem? Concept: Refraction at Spherical Surfaces and by Lenses - Power of a Lens.
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