Binocular fusion of luminance, color, motion and flicker – Two eyes are worse than one

Binocular fusion of luminance, color, motion and flicker – Two eyes are worse than one

UNLABELLED How much information is conserved, or discarded, as it travels through the visual system? A target (an oriented bar) was defined by dark grey spots embedded in light spots for the left eye, and by light grey spots embedded in dark spots for the right eye. With one eye open, the target bars were clearly visible, but with both eyes open the light and dark spots fused binocularly into m...

Two eyes are better than one: binocular enhancement in the contrast domain.

The purpose of this study was to compare the improvement in visual acuity (VA) with the improvement in contrast sensitivity (CS) with two eyes as compared with one. Computer generated letter charts were used to measure VA and small letter CS (20/25 Snellen equivalent) in 13 emmetropic subjects. Letter size (for VA) and contrast (for CS) were varied in equal log steps making the task comparable ...

Nonlinear combination of luminance excursions during flicker, simultaneous contrast, afterimages and binocular fusion

The changes in apparent brightness or color, induced into a test spot by a surround, can be greatly enhanced either by flickering the test spot between two luminances, or by binocularly fusing a pair of test spots of different luminances. Simultaneous contrast, in which a white surround makes a grey spot look darker, is greatly enhanced if the spot (not the surround) flickers between black and ...

Many Minds are No Worse than One

Two carriers for motion perception: color and luminance.

Starting with the experiments of Ramachandran and Gregory (Nature, 275, 55-56, 1978), several psychophysical studies in apparent motion (AM) have established that the perception of motion is significantly impaired at equiluminance. Still debated, however, is whether color alone can resolve ambiguities in AM. We report here on several psychophysical experiments, the quantitative results of which...