http://www.ck12.org Chapter 5. Energy
- Nearsightedness, or myopia, is the condition in which nearby objects are seen clearly, but distant objects
appear blurry. The eyeball is longer than normal, focusing images front of the retina. Concave lenses can
correct the problem. - Farsightedness, or hyperopia, is the condition in which distant objects are seen clearly, but nearby objects
appear blurry. The eyeball is shorter than normal, focusing images behind the retina. Convex lenses can
correct the problem.
Vocabulary
- vision: Ability to sense visible light and see.
Explore More
Answer the questions on the vision test at the following URL. Be sure to have your answers marked.
http://www.bbc.co.uk/bitesize/standard/physics/health_physics/light_and_sound/quiz/q47452370/
Review
- Compare and contrast myopia and hyperopia.
- Explain how lenses can be used to correct vision problems.