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The Eye

The Eye. Each eyeball is controlled by ____ eye muscles. . two. four. six. eight. 2. What is the colour of the sclera?. blue. white. black. brown. 3 . The lens inside our eye is a piece of . plane lens. convex lens.

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The Eye

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  1. The Eye

  2. Each eyeball is controlled by ____ eye muscles. two four six eight

  3. 2. What is the colour of the sclera? blue white black brown

  4. 3. The lens inside our eye is a piece of plane lens. convex lens. concave lens.

  5. 4. The front part of the eye is covered by the retina cornea sclera iris

  6. 5. Light ray passes through _______ and enters the eyes. retina pupil optic nerve sclerotic coat

  7. 6. Which of the following about the path of light entering the eyes is CORRECT? lens -> pupil -> cornea -> jelly-like fluid -> sclerotic coat pupil -> cornea -> lens -> jelly-like fluid -> retina cornea -> pupil -> lens -> jelly-like fluid -> retina iris -> lens -> jelly-like fluid -> retina

  8. 7. Which of the following correctly states the function of the lens? Refract light and allows light to focus on the retina. Maintain the shape of the eye ball. Control the amount of light entering the eye. Absorb light and prevent reflection of light inside the eye ball.

  9. 8. The lens unit inside the camera is similar to the _______ inside human eye. Cornea Iris Lens Circular muscle

  10. 9. The ______ inside the camera is similar to the cornea inside human eye. lens unit diaphragm filter film

  11. 10. Which of the following description about watching distant object is CORRECT? Ciliary muscle contracts, lens no longer forced outward, lens become thicker and more curved. Ciliary muscle contracts, lens is forced outward, lens become thinner and flatter. Ciliarymuscle relaxes, lens is forced outward, lens become thinner and flatter. Ciliary muscle relaxes, lens no longer forced outward, lens become thicker and more curved.

  12. 11. Retina contains millions of light-sensitive cells. optic nerve. lens. iris.

  13. 12. Which of the following is NOT acommon eye defect mentioned in the programme ? Short sight Long sight Presbyopia Colour blindness

  14. 13. What is the casue of astigmatism? The lens becomes cloudy. The curature of the cornea surface or lens is uneven. The eyeball is too long. The eyeball is too short.

  15. 14. People with astigmatism can wear ________ to correct it. Concave lens Convex lens Column shaped glasses

  16. 15. Which of the following is NOT an acquired cause of short-sighted? People often look at near objects. The eye ball is too long. The posture while reading is incorrect. People spend a long time looking at near objects.

  17. 16. Short-sighted people can wear spectacles of _______ to correct short sight. concave lens convex lens

  18. 17. Which of the following is NOT a cause of long-sighted? The eye ball is too long. The ciliary muscle is too weak. The lens is too thin and flat. The eye ball is too short.

  19. 18. Which of the following is NOT a cause of presbyopia? The lens cannot become thinner and flatter. The ciliary muscle gets weaker. The lens loses elasticity. The lens cannot become thicker and more curved.

  20. 19.Which of the following is the ideal reading distance? 10 inches 12 inches 14 inches 20 inches

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