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How is Accommodation Produced? - Physics

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How is accommodation produced?

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 Accommodation is achieved with the help of ciliary muscles.
To focus the distant objects, the ciliary muscles are relaxed causing the eye lens to become thin and thus increasing the focal length of the eye lens.
To form the image of a near object on the retina, the ciliary muscles contract and thereby pull the ends of the choroid closer. Thus, the eye lens thickens to shorten its focal length and converges the rays to form the image.
 In this manner, by changing the focal length of the eye lens, the image of the objects at different distances is brought to focus on the retina.

Concept: Refraction of Light from a Plane Transparent Surface
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Frank ICSE Class 10 Physics Part 2
Chapter 2 Light
Exercise | Q 2.2 | Page 114
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