Nearsightedness

Ages

Introduction

Summary

Pedagogical animation of the myopic (nearsighted) eye. Myopia is a condition where the eye is too long in relation to its refractive power. The light rays thus intersect, forming an image,  in front of the retina. Notice that nearsighted people typically see well up close, but have difficulty seeing far away.
The corrective lens modifies the focal length to shift the point of intersection to the surface of the retina. We also show that correction moves the "near point" away from the eye.
You can click and drag the object to move it along the optic axis.
Diagrams are not drawn to scale.

Goals

• To understand nearsightedness  and how a lens is able to correct it.

Features

Rollover  the image of the eye to display the names of its parts.

Click and drag the object along the optic axis.

Click on to add the correction.

Student sheet

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Tags

myopia myopic correction glass lens near-point image retina eye Crytalline-lens nearsightedness