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The focal length of the eye lens can be adjusted with the help of muscles.

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Important Questions on The Human Eye and the Colourful World

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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
What is the least distance for distinct vision for normal eye?
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
What type/nature of image is formed by the eye lens at retina?
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
On which part of the eye does the human eye form the image of an object?
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
Which type of lens is in human eye?
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
Which part of the human eye controls the entering of the light rays into the eye? 
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
What is myopia? How can it be corrected?
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
What is hypermetropia? Which type of lens is used to correct it?
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
The least distance of distinct vision for young adult with normal vision is about _____ cm.
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision

Elaborate the term Astigmatism. How this defect is corrected?

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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision

Select the correct alternative from those given below each statement and write the completed statement :
The part of eye that regulates and controls the amount of light entering the eye is ________

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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
The human eye forms the image of an object at its:
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
Draw a neat and labelled diagram of the human eye.
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
What is hypermetropia? Give its causes. Explain with the help of a labelled ray diagram, how it is corrected.
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
What is meant by power of accomodation of human eye?
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
Draw a well labelled diagram of human eye.
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
The least distance of distinct vision for a normal human eye is 
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
The least distance of distinct vision for a young adult with normal vision is about -
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
In Hypermetropia, a person is not able to see:
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
For the normal human eye, the near point is at _____ cm.
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
The change in focal length of an eye-lens is caused by the action of the_____.