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What is the function of the iris ?...

What is the function of the iris ?

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The iris controls the size of the pupil.
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KUMAR PRAKASHAN-THE HUMAN EYE AND THE COLOURFUL WORLD-OBJECTIVE QUESTIONS AND ANSWERS (Answer the following questions in very short as directed (Miscellaneous) )
  1. Which portion of a bi-focal lens is (a) a concave lens (b)a convex l...

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  2. When sunlight enters into a room filled with dark smoke, its path beco...

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  3. What is the function of the iris ?

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  4. What are light sensitive cells ?

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  5. What type of signals are generated and sent to the brain by light sens...

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  6. What holds the crystalline lens in the human eye?

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  7. Which part of the human eye helps in changing the thickness of the eye...

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  8. What is dispersion of white light ?

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  9. Give the main difference between the lens of the human eye and the len...

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  10. The image formed on the retina is inverted, but we see the object erec...

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  11. The absolute refractive index of a medium is 2.0. The speed of light i...

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  12. Match the column properly:

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  13. Match the following column:

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  14. The far point of a myopic eye is 100 cm. What is the focal length of t...

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  15. The near point of a hypermetropic eye is 75 cm. What is the focal leng...

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  16. The eye lens of human eye is a double convex lens. Agree or Disagree?

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  17. Cone-shaped retinal cells respond to the brightness or intensity of li...

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  18. Which property of vision is used in cinematography ?

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  19. What is aqueous humour ?

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  20. What is the maximum power of accommodation of a normal eye ?

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