Topic: Defects Of Eye�

Date:29 August 2022

Subject: Physics

Standard: X

EYE AND VISION

• Do you know how different objects become visible to us?

DEFECTS OF EYE

• Defects in eye happen due to many reasons. Due to growing age, genetic problems and accidents are few reasons for this.
• There are three typical eye defects and they are;
• Myopia or Near-sightedness
• Hypermetropia or Far-sightedness
• Presbyopia

�1.Myopia or Near-sightedness�

�2.Hypermetropia or far sightedness �

�3.Presbyopia �

For a healthy vision what is the near point?

How to overcome the defects of eyes?

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Several methods are available to cure these defects. Few are given below.

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-Myopia –using concave lens of suitable powers

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-Hypermetropia -using convex lens of suitable powers

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-Presbyopia-using convex lens of suitable powers

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AFL-1 Answer in One Word

1. How many types of eye defects are there?

-Three(3)

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2. Another name for myopia?

- Near-sightedness

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3. How to rectify hypermetropia?

- Using convex lens of suitable powers

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AFL-2 MCQ

1. The defects usually seen in elderly people?

• Myopia or Near-sightedness
• Hypermetropia or Far-sightedness
• Presbyopia

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Wrong Answer!�…..Try again

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AFL-2 MCQ

2.Another name for hypermetropia

• Near-sightedness
• Far-sightedness
• Presbyopia

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Excellent!�…..You are right

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Wrong Answer!�…..Try again

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Wrong Answer!�…..Try again

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Wrong Answer!�…..Try again

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Thank you……………