5.2 The human nervous system

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Question 12
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A hiker is looking at a distant mountain peak. They then look down at a handheld map to check their route.

a.

What is the name of the process by which the eye adjusts its lens shape to focus on objects at different distances?

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b.

When the hiker changes their focus from the distant mountain to the near map, how does the eye adjust to focus the light rays onto the retina? Select from:

  • A: The ciliary muscles contract, the suspensory ligaments slacken, the lens becomes thicker, and light rays are refracted more.
  • B: The ciliary muscles relax, the suspensory ligaments tighten, the lens becomes thinner, and light rays are refracted less.
  • C: The ciliary muscles contract, the suspensory ligaments tighten, the lens becomes thinner, and light rays are refracted more.
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c.

The hiker has difficulty reading the map clearly because near objects appear blurry, though the distant mountain is perfectly sharp. What is the medical name for this vision defect?

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5.2 The human nervous system Questions

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