(Experimento: ¿Dos ojos son mejores que uno?)

How two eyes give you more depth perception, which is the ability to judge how near or far objects are.

Two pencils

1. Hold a pencil lengthwise (on its side) in each hand.
2. Now, with one eye closed, try to touch the erasers together. Did you miss?
3. Now, try it with both eyes open. Voila! Two eyes give you better depth perception.

Your Eyes

Reviewed by: Eric H. Chudler, PhD
Date reviewed: June 2008