Amblyopia ("lazy eye") is an impairment in visual acuity resulting from abnormal neural development in the visual cortex. We tested the responses of ten amblyopic and six normal observers to illusions of perceived orientation in textures of Gabor patches: the "Fraser illusion," the "phase illusion," and a "tilted chain" illusion. The illusory tilt of the stimulus rows was matched by actual tilt...

The Rotating Snakes Illusion employs patterns with repetitive asymmetric luminance steps forming a "snake wheel." In the underlying luminance sequence {black, dark grey, white, light grey}, coded as {0, g1, 100, g2}, we varied g1 and g2 and measured illusion strength via nulling: Saccades were performed next to a "snake wheel" that rotated physically; observers adjusted rotation until a station...

The Ebbinghaus illusion has traditionally been considered as either a sensory or a cognitive illusion, or some combination of these two. Cognitive contrast explanations take support from the way the illusion varies with the degree of shape similarity between the test and inducing elements; we show, however, that contour interaction explanations may account for this result too. We therefore test...

For whole-body interaction for computer entertainment, I propose applying electrical stimulations to tendons to create an illusory motion of the limbs so that real motion becomes unnecessary. Strong vibrations to joints induce the well-known kinesthetic illusion, but electrically inducing this illusion has been rarely explored. An experiment is described showing that this illusion can be genera...

The sequence in which two sma& spatially unresolved spots of light are Rashed in the periphery of the visual field can be determined by means of a “fine-grain” movement illusion. The illusion can be produced not only by rod-rod and by cone-cone stimulation. but also by rod-cone stimulation. Dynamics of the illusion are obtained by sequence-discrimination experiments for each of these three stim...