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Which part of the eye acts as variable a...

Which part of the eye acts as variable aperture for entry of light into the eye .

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The iris enables 'pupil' to act as a variable aperture for entry of light into the eye, by -helping the pupil' to expand in low light condition and contrast in bright light condition.
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Knowledge Check

  • The eye lens is

    A
    Convex lens , hard in the middle , become soft towards outer edge
    B
    Convex lens, soft in the middle, become hard towards outer edge.
    C
    Concave lens, hard in the middle, become soft towards outer edge.
    D
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  • Which one of the following acts as a physiological barrier to the entry of microorganisms in human body?

    A
    Epithelium of urogenital tract
    B
    Tears
    C
    Monocytes
    D
    Skin

  • Which of the following regulates the amount of light entering the eye?

    A
    Lens
    B
    Ciliary body
    C
    Iris
    D
    Aqueous humor

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