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Why is a normal eye not able to see clearly the objects placed closer than 25 cm? - Science

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Answer in Brief

Why is a normal eye not able to see clearly the objects placed closer than 25 cm?

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Solution 1

A normal eye is unable to clearly see the objects placed closer than 25 cm because the ciliary muscles of eyes are unable to contract beyond a certain limit.

Solution 2

The least distance for distinct vision for a normal human eye is 25 centimetres. Therefore, in order to see the printed matter in a book clearly, without straining our eyes, the book must be held at a distance of 25 centimetres from our eyes. When it is placed nearer to the eyes, the printed material in the book appears blurred and we feel strain in our eyes.

Concept: Eye Defect and Its Correction: Myopia Or Near-sightedness
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APPEARS IN

NCERT Class 10 Science
Chapter 11 The Human Eye and the Colourful World
Q 8 | Page 198
Lakhmir Singh Class 10 Physics (Science)
Chapter 6 The Human Eyes And The Colorful World
Q 26 | Page 270

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