![[Biology]](../inline/biology.gif)
![[Perceptive Peepers]](inline/sight.gif)
![[Theory:]](../../inline/theory.gif)
- Have you ever wondered why we have two eyes? Each of our eyes see
things from a slightly different place. This gives depth to what we are
seeing, so we see things in three dimensions (with height, width, and
depth). Here is an activity where you can try to see what the effects of
having the use of only one eye can be.
![[Materials:]](../../inline/material.gif)
- tennis ball
- eye patch
- a partner
![[Procedure:]](../../inline/procedure.gif)
- Toss a ball back and forth between you and a partner with one hand.
- Now close one eye. Is it easier or harder to catch the ball?
![[Conclusions:]](../../inline/concl.gif)
- Imagine going through life with only one eye. We would have no depth
perception, so it would be like looking at a flat picture constantly! When
you tried to catch the tennis ball with only one eye, you had no depth
perception and therefore couldn't tell how far away the ball was, making it
difficult to catch.
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Produced by Galactics.
Comments: galactics@spacesim.org.
Last updated on 14 August 1998.