(A) The human eye is in a relaxed state when it is focused on objects at infinity. In this state,the ciliary muscles are least strained,and the focal

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(A) The human eye is in a relaxed state when it is focused on objects at infinity. In this state,the ciliary muscles are least strained,and the focal length of the eye lens is at its maximum. As the object moves closer to the eye,the ciliary muscles must contract to increase the curvature of the lens,thereby decreasing the focal length to maintain focus on the retina. Therefore,the strain on the ciliary muscles is minimum when the object is at infinity.

Class 12 Physics Ray Optics and Optical Instruments Human Eye and Defects of Vision

Easy

When the human eye is focused on an object,the ciliary muscles are least strained when the object is at:

A
Infinity
B
$A$ very short distance from the eye
C
$A$ distance of $25 \, cm$ from the eye
D
$A$ distance of $1 \, m$ from the eye

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Ray Optics and Optical Instruments

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Human Eye and Defects of Vision

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MediumNEET 2017

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When the human eye is focused on an object,the ciliary muscles are least strained when the object is at:

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$A$ person has been using spectacles of power $-1.0$ diopter for distant vision and a separate reading glass of power $+2.0$ diopters. What is the least distance of distinct vision for this person in $cm$?

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