Although your body is comparatively at rest, what are your eyes doing? They are automatically focusing on successive words or groups of words. The visual impressions are being changed in the back of your eyes to electrical impulses. These are being carried to your brain. If you are concentrating, the brain is storing up information for future use and comparing new material with what was received previously.

EYE: A fully automatic, self-focusing, nonblurring, color motion-picture camera that takes instant three-dimensional pictures needing no laboratory development.