The contrast sensitivity of the human eye for sinusoidal illuminance changes was measured
as a function of spatial frequency, for monochromatic light with wavelengths of 450, 525, and …

This paper deals with some measurements concerning the threshold versus duration for tone
pulses. A new hypothesis introduced: Switching on a tone pulse of intensity I results in an …

The contrast sensitivity of the human eye for sinusoidal illuminance changes in space and
time, obtained by means of traveling-wave stimuli, was measured as a function of spatial and …

In the most general sense, dark and light adaptation simply mean getting accustomed to
lesser or greater levels of environmental illumination. The importance and efficiency of the …

The threshold visibility of uniformly moving colored gratings was investigated. The gratings
were equiluminous sine-wave patterns, generated on a color-television display. The traveling …

Contrast detection thresholds for moving spatial sine wave gratings were obtained, at the
fovea, and at eccentricities of 1, 2, 4, 6, and 8 on the nasal horizontal meridian, for two subjects. …

In this chapter the term “Perimetry” is used to include all kinds of investigations of visual fields.
Before discussing perimetry we should explain what is meant by the “visual field”. There …

The implicit assumption that visual perception is not susceptible to influences from extraretinal
sources 1 has held extremely well in the areas of color vision, contour perception, and …

The aim of this systematic review was to identify operations that are used to improve mouth
opening in patients with extra-articular trismus (caused by cancer and its treatment, oral …

Seeing shapes and patterns is the major capacity inherent in our visual system. It depends,
to be sure, on the ability to distinguish differences in light intensity and color, but this is not …