http://www.ck12.org Chapter 1. Human Biology
Practice
Use the resources below to answer the questions that follow.
- Myopia, Hyperopia, and Astigmatism Explainedat http://www.youtube.com/watch?v=6YxffFmi4Eo (1:55)
MEDIA
Click image to the left for more content.- How can the shape of your eyeball cause you to be farsighted? How does this affect your focal point?
- How can the shape of your eyeball cause you to be nearsighted? How does this affect your focal point?
- How can an irregularly formed cornea affect your vision?
- Nearsighted, Farsighted, and Reading Glassesat http://www.youtube.com/watch?v=iws1Mfu1k84 (1:39)
MEDIA
Click image to the left for more content.- What is myopia? If you had this condition, when might you wear glasses?
- What is hyperopia? If you had this condition, when might you wear glasses?
- What is an astigmatism? If you had an astigmatism, when might you wear glasses?
- At what age do many people start needing reading glasses? What causes this condition?
Review
- What is hyperopia, and what type of lens corrects it?
- What causes myopia, and what type of lens corrects it?