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Due to gradual weakening of ciliary musc...

Due to gradual weakening of ciliary muscles and diminishing flexibility of the eye lens, a certain defect of vision arises. Write the name of this defect. Name the type of lens required by such persons to improve the vision. Explain the structure and function of such a lens.

Text Solution

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The name of this defect is Myopia or short sightedness. For details,.
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What is presbyopia ? Write two causes of this defect. Name the type of lens which can be used to correct presbyopia.

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Knowledge Check

  • When the power of eye lens increases, the defect of vision is produced. The defect is known as

    A
    shortsightedness
    B
    longsightness
    C
    colourblindness
    D
    None of the above

  • When the power of eye lens increases, the defect of vision is produced. The defect is known as

    A
    Shortsightedness
    B
    Longsightedness
    C
    Colourblindness
    D
    None of the above

  • The old age defect in the eye due to reduction in flexibility of lens is called

    A
    presbyopia
    B
    cataract
    C
    glucoma
    D
    uyopia

    • Similar Questions

    Explore conceptually related problems

    Given below is a diagram showing defect of human eye . Name the type of lens used to correct the eye defect.

    Name one defect of vision (or eye) which cannot be corrected by any type of spectacle lenses.

    Observe the diagram given and answer the question asked. c. Name the type of lens used to correct this defect.

    A person may suffer from both myopia and hypermetropia defects. (a) What is this condition called? (b) When does it happen? (c) Name the type of lens often required by the persons suffering from this defect. Draw labelled diagram of such lenses.

    Name the defect of vision which makes the eye-lens cloudly resulting in blurred vision.

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