[an error occurred while processing this directive]

Nearsightedness and Farsightedness

Nearsightedness and farsightedness (also known as myopia and hyperopia) are defects of the lens, cornea, or axial dimension of the eyeball. The image of an object comes to a focus in front of the retina in one case and behind the retina in the other, causing blurred vision of distant or nearby objects. This can be corrected with concave and convex lenses, respectively, by adjusting the image distance , which spans from the lens (light blue) to the focus (black point), to be on the retina.



  • [Snapshot]
  • [Snapshot]
  • [Snapshot]


For more details on the subject, see the Wikipedia entries Myopia and Hyperopia.


[an error occurred while processing this directive]

Mathematica »
The #1 tool for creating Demonstrations
and anything technical.
Wolfram|Alpha »
Explore anything with the first
computational knowledge engine.
MathWorld »
The web's most extensive
mathematics resource.
Course Assistant Apps »
An app for every course—
right in the palm of your hand.
Wolfram Blog »
Read our views on math,
science, and technology.
Computable Document Format »
The format that makes Demonstrations
(and any information) easy to share and
interact with.
STEM Initiative »
Programs & resources for
educators, schools & students.
Computerbasedmath.org »
Join the initiative for modernizing
math education.
Step-by-Step Solutions »
Walk through homework problems one step at a time, with hints to help along the way.
Wolfram Problem Generator »
Unlimited random practice problems and answers with built-in step-by-step solutions. Practice online or make a printable study sheet.
Wolfram Language »
Knowledge-based programming for everyone.
Powered by Wolfram Mathematica © 2018 Wolfram Demonstrations Project & Contributors  |  Terms of Use  |  Privacy Policy  |  RSS Give us your feedback
Note: To run this Demonstration you need Mathematica 7+ or the free Mathematica Player 7EX
Download or upgrade to Mathematica Player 7EX
I already have Mathematica Player or Mathematica 7+