Seven Truths of Normal Sight

1 - Normal Sight can always be demonstrated in the normal eye, but
only under favorable conditions.
2 - Central Fixation: The letter or part of the letter regarded is
always seen best.
3 - Shifting: The point regarded changes rapidly and continuously.
4 - Swinging: When the shifting is slow, the letters appear to move
from side to side or in other directions with a pendulum-like motion.
5 - Memory is perfect The color and background of the letters, or
other objects seen are remembered perfectly, instantaneously and
continuously
6 - Imagination is good. One may even see the white part of the
letters whiter than it really is, while the black is not altered by
distance, illumination, size, or form, of the letters.
7 - Rest or relaxation of the eye and mind is perfect and can always
be demonstrated.
When one of these seven fundamentals is perfect all are perfect.