Anatomy and Physiology Chapter 10: The Senses Human Eye Model: Lab Questions



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Anatomy and Physiology Chapter 10: The Senses

Human Eye Model: Lab Questions

  1. What does a real human eye do to change the focal length of the lens?

  2. If you can see close up, but not well far away, this is known as:

    1. Hypermetropia

    2. Myopia

    3. Astigmatism

    4. Blind Spot

  3. If you can see far away, but not well close-up, this is known as:

    1. Hypermetropia

    2. Myopia

    3. Astigmatism

    4. Blind Spot

  4. Does a hypermetropic eye have a far point that is too near, or a near point that is too far? Explain.

  5. In lab, you showed that the eye can compensate for hypermetropia by accommodation. Why might this compensation be insufficient to allow a person to read without glasses?

  6. Why would the ability of the eye to compensate for hypermetropia decrease with age?

  7. In lab, which of the following lenses best corrected for hypermetropia?

    1. +62

    2. +400

    3. -128

    4. -1000

  8. Does myopic eye have a far point that is too near, or a near point that is too far? Explain.

  9. On a real eyeglasses lens, with one convex surface and one concave surface, which surface must be more curved to correct myopia? Explain (would this make it a converging or diverging lens?).

  10. In lab, which of the following lenses best corrected for myopia?

    1. +62

    2. +400

    3. -128

    4. -1000

  11. What would be the effect to sight of a lens that becomes more rigid, making it less able to accommodate to short object distances? Would this be more like myopia or hypermetropia? Explain.

  12. How is the normal eye different from one with astigmatism?

  13. Why does rotating the corrective lens for astigmatism affect the image, but rotating a corrective lens for hypermetropia or myopia does not?

  14. How would real eyeglasses lens be made to correct for both astigmatism and hypermetropia?

  15. How can two, different sized objects, appear the same size on the retina of the eye? Explain.



modified 7/7/2018


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