Now showing items 31-40 of 90
Local control of retinomotor activity in the fish retina
(Elsevier, 1978)
Small circular spots of light were focussed on otherwise unilluminated retinas of paralyzed fish. Cichlasoma biocellatum. The retinas were subsequently examined histologically, and a small circular region was found within ...
Growth of the adult goldfish eye--I: Optics
(Elsevier, 1977)
We have measured the optical and retinal fields of goldfish eyes; the animals ranged from 6 to 20 cm in body length. Both fields are spherically symmetric, invariant with the size of the eye, and equal (retinal FIELD = ...
Sinusoidal flicker characteristics of the color-sensitive mechanisms of the eye
(Elsevier, 1969-05)
The flicker characteristics of the color-receptive systems of the eye were investigated by measuring the modulation thresholds for sinusoidal flicker of one color superimposed on a background of a complimentary color. A ...
Wavelength variation in directional sensitivity of the long- and medium-wave sensitive foveal cones of red-green dichromats
(Elsevier, 1979)
The intensity of a monochromatic light required just to detect 30 Hz flicker as the point of entry of the light was changed in 0.5 mm steps across the eye's entrance pupil and measured throughout the spectrum on 4 protanopes ...
Color discrimination at threshold: The approach through increment threshold sensitivity
(Elsevier, 1982)
A close correlation between Stiles's increment threshold ([pi]-mechanism) approach and color discrimination at threshold was found: a sharp transition from detection of two lights via two [pi]-mechanisms ([pi]1 and [pi]4) ...
Visual spatial interactions between dotted line segments
(Elsevier, 1976)
This study examines the interactions that occur between dotted line segments as a function of their separation and orientation using a dotted target detection paradigm. The results of the experiment indicate that it is the ...
Electroretinographically-determined scotopic spectral sensitivities of some marine fish
(Elsevier, 1973-06)
The b-wave threshold spectral sensitivity was determined in three species of marine fish. In all cases, the action spectrum of the dark adapted animal peaked at 510-520 nm and fit Dartnall's template curve for the extinction ...
Interactions of the horizontal and vertical human oculomotor systems: The vertical smooth pursuit and horizontal saccadic systems
(Elsevier, 1972-01)
The human oculomotor system has been studied by numerous people for well over half a century. Since the visual system is our primary sensory input channel, it is important for us to know how information is processed by the ...
A note on the action spectrum of human rod vision
(Elsevier, 1987)
A template representing the spectral distribution of the absorption coefficients of human rhodospin was fitted to each of 59 individual action spectra of human rod vision (from one of three populations) by an optimization ...