THIS IS A SIMPLE EXAMPLE OF HOW YOUR NERVOUS SYSTEM
HOLDS ON TO MEMORIES OF PAST EXPERIENCES
(here, as a retinal image).

Instructions:

Concentrate on the four dots, in the middle of the picture, for about 30 seconds.

Then, close your eyes and tilt your head back for a moment.

Keep your eyes closed... You will see a circle of light; continue looking at the circle...

WHAT DO YOU SEE??