Self Studies

Human Eye and C...

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  • Question 1
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    Long sightedness happens as:

  • Question 2
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    A girl viewed an object and found that it is not clearly visible to her. It was found that the image was formed by her eye lens 3cm3cm away from the pupil of her eyes.The girl can correct this defect by using a:

  • Question 3
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    Near point of an eye suffering from long-sightedness is:

  • Question 4
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    The farthest point, upto which the eye can see objects clearly, is called ________, and is ________ for a normal eye.

  • Question 5
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    What is the black circular aperture in our eyes and why does it appear black?

  • Question 6
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    Match the columns

    i. amount of light entering into eye controlled bya. rodes 
    ii. colour sensing cells b. cones
    iii.cells helping in vision in dim lightc. iris
    iv. junction of optic nerve and retina d. blindspot

  • Question 7
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    Match the columns:

    i. convex lens    a. presbyopia
    ii. concave lensb. cataract
    iii. Artificial lensc. myopia
    iv. focal lensd. hypermetropia

  • Question 8
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    Fill in the blanks:
    For a human eye lens, for nearby objects, focal length ____  while for far away objects  focal length ____ .

  • Question 9
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    Match the following

    List IList II
    1Adjustment of focal lengthaAccommodation
    2Least distance of distinct visionbInfinity
    3Farthest point of visibilityc25 cm
    4Vision impairmentdCataract

  • Question 10
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    The minimum distance at which objects can be seen without any strain is 

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