Senses Get
Tired Too!
Visual Fatigue
--Visual fatigue
comprises all those symptoms that arise after excessive stress on any
of the functions of the eye.
-Ganzfeld's Experiment
Stimulation frm the environment usually contains variations or discontinuities--changes--in
luminance and surface textures. However, when we view a completely textureless
field of uniform vrightness--an entiredly homogeneous field called Ganzfeld--we
perceive an unstructured, ambiguous, and disoriented environment. The greater
the stimulus change, the greater is the perception of form qualities. (Schiffman,
H. R. 2001.Sensation and perception: an intergrated approach, pp. 149.)
-
Below is a picture of a negative afterimage. Stare at the square in the
center of the two dots for about 30 seconds and then look over to the right
at the side without the dots.
- Below is a photograph of a flag. Stare at the flag
for about 30 seconds then quickly glance at the white space next to the
flag. You should be seeing negative agterimages.
You can also click on the image below to enlarge it.
- Below is another example of an afterimage. This
time the picture is of a stop sign. Stare at the white dot that is centered
in the center of the sign and then at the white space beside it.
You can also click on the image below to enlarge
it.
