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The image formation in human eye is shown in the given diagram.

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The lens used to correct this type of eye defect is:

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Important Questions on Light

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Science>Physics>Light>Defects of Vision and their Correction
Write the function of crystalline lens of human eye.
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Science>Physics>Light>Defects of Vision and their Correction
Where does image form in the human eye?
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Science>Physics>Light>Defects of Vision and their Correction
What is the far point for normal human eyes?
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Science>Physics>Light>Defects of Vision and their Correction
A student is unable to see clearly the words written on the black board placed at a distance of approximately 3 m from him. Name the defect of vision the boy is suffering from. State the possible causes of this defect and explain the method of correcting it.
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Science>Physics>Light>Defects of Vision and their Correction
Which of the following statement is correct?
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Science>Physics>Light>Defects of Vision and their Correction
Write the function of cornea of human eye.
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Science>Physics>Light>Defects of Vision and their Correction
The least distance of distinct vision for healthy eye is
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Science>Physics>Light>Defects of Vision and their Correction

Which of the following eye defects can be rectified using cylindrical lens?

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Science>Physics>Light>Defects of Vision and their Correction
The change in focal length of an eye-lens is caused by the action of the_____.
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Science>Physics>Light>Defects of Vision and their Correction
For a young adult with normal vision, what is the value of the least distance?
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Science>Physics>Light>Defects of Vision and their Correction
Write the function of ciliary muscles of human eye.
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Science>Physics>Light>Defects of Vision and their Correction
A person cannot see the object beyond 50 cm. The power of lens to correct this defect will be
MEDIUM
Science>Physics>Light>Defects of Vision and their Correction
When do we consider a person to be myopic or hypermetropic? List two causes of hypermetropia. Explain using ray diagrams how the defect associated with hypermetropic eye can be corrected.
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Science>Physics>Light>Defects of Vision and their Correction
Write the function of iris of human eye.
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Science>Physics>Light>Defects of Vision and their Correction

A short sighted person uses a spectacle of power -0.4 D to see very distant objects. How far can he see without using spectacle?

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Science>Physics>Light>Defects of Vision and their Correction

A person can not clearly see objects at a distance more than 40 cm. He is advised to use lens of power

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Science>Physics>Light>Defects of Vision and their Correction
The image of an object is formed by the human eye at its :
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Science>Physics>Light>Defects of Vision and their Correction
Nethra, who is a back-bencher, discovers one day in the class that she is unable to discern the details on the blackboard very well. When she visits an optician, he prescribes glasses for her. Which of the following statement(s) is/are false? 
I. She suffers from myopia where the far point is nearer than the blackboard.
II. A concave lens with a suitable power a help corrects her vision.
III. Her eye is defective and is forming images in front of the retina.
IV. A concave lens or a convex lens may be used to correct her vision. 
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Science>Physics>Light>Defects of Vision and their Correction
Sheela cannot read newspaper when she holds it closer than 100 cm. The defect in her eye and the power of lens prescribed to her [Normal eye near point = 25 cm]
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Science>Physics>Light>Defects of Vision and their Correction
The eyeball of a person is elongated as compared to that of a normal eye. He is suffering