What is meant by visual acuity? How does the eye adjust to facilitate this? Specifically, how do changes in near-point accommodation and astigmatism affect acuity? What is the problem with changes in near-point accommodation and astigmatism and why are they problematic? How can each of these be measured? Can these conditions be corrected? If so, how? Do these conditions change as we age?

Human Physiology: From Cells to Systems (MindTap Course List)
9th Edition
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Lauralee Sherwood
Chapter6: The Peripheral Nervous System: Afferent Division; Special Senses
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Explain the normal functioning of the eye to allow us to have visual acuity. 

  • What is meant by visual acuity? How does the eye adjust to facilitate this?
  • Specifically, how do changes in near-point accommodation and astigmatism affect acuity?
  • What is the problem with changes in near-point accommodation and astigmatism and why are they problematic? How can each of these be measured? Can these conditions be corrected? If so, how? Do these conditions change as we age?
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