Describes an experiment revealing a visual latency effect produced by the wearing of sunglasses. (SL)

A fly is buzzing around in the kitchen. You sneak up on it with a flyswatter, but just as you get close to it, it flies away. What makes flies and other insects so good at escaping from danger? The fact that insects have eyesight that can easily detect moving objects is one of the things that help them survive. In this month's Science Shorts,…

Presents a quantitative calculation of the inadequacy of human vision to illustrate Heisenberg's uncertainty principle. (MLH)

A discussion of Edwin Land's experiments with color images from black-and-white photographs. Information is presented for duplication of these experiments by the amateur photographer. (BB)

Understanding vision is not a simple task. Nevertheless, a great deal is known about vision, more than about any of our other senses. The articles collected in this volume were chosen and organized with the intention of providing a survey of a number of different areas of vision research. Three major sections focus on the general categories of…

Studies demonstrate increasing glucose metabolic rates in human primary (PVC) and association (AVC) visual cortex as complexity of visual scenes increase. AVC increased more rapidly with scene complexity than PVC and increased local metabolic activities above control subject with eyes closed; indicates wide range and metabolic reserve of visual…

Discusses human ability to perceive repeated sensory stimuli in the visual system, and explains that its frequency fc has a critical value, under normal conditions, about 40 Hz. (GA)

Going to the movies or watching Saturday morning cartoons has become a fixture of contemporary American life, but have you ever stopped to contemplate how those "moving" images on film are conveyed to our eyes and brain? The movement that we see on film is actually a series of still images, every image separated from the next by brief spaces of…

Reviews research done on the nature of vision from a neurologic perspective. Proposes a multiplex filter model to explain patterns in the signals transmitted to the brain from the retina. Describes experiments done to test the model. (CW)