1. Look at the two gratings on the right side of the figure. Do you see any differences between them?2. Now for about 60 seconds scan your gaze back and forth along the horizontal red bar between the two gratings on the left.
3. When you are finished scanning back and forth along the horizontal red bar, fixate on the short red bar between the gratings on the right.
4. What differences do you see between these two gratings on the right compared to the first time you looked at these gratings?
Table of Contents
Subject Index
Table of Contents [When not using framtes]