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.
LORRIN A. RIGGS and S. ÜLKER TULUNAY, "Visual Effects of Varying the Extent of Compensation for Eye Movements," J. Opt. Soc. Am. 49, 741-745 (1959)