Visual effects of varying the extent of compensation for eye movements.

The effects of small, involuntary eye movements have been counteracted by an optical system that fixes a test image at a given point on the retina. This causes the test object to disappear. In the present experiment the relative amount of image motion has been varied over a wide range, with special attention to the condition of nearly complete absence of image motion. The disappearance is greatest for low contrast images with minimal amounts of motion.