The Magnitude of the Pulfrich Stereophenomenon as a Function of Binocular Differences of Intensity at Various Levels of Illumination

Do depth shifts resulting from an interocular delay in stimulation result from a breakdown of binocular fusion?

“…These sessions were run under the same stimulus conditions used for two-flash thresholds except that different response categories were employed. If S perceived the vertical bar (right eye) and the horizontal bar (left eye) as occurring simultaneously, he phenomenon (Pulfrich, 1922;Lit, 1949). In this case, however, it is clear that the temporal disparity produced by a luminance difference between the eyes, which results in a retinal latency difference, has its effect directly on retinal disparity.…”

A saccadic suppression explanation of the Pulfrich phenomenon

“…A review of Lit (1949) indicates that this method of producing depth displacement of a swinging pendulum was known in 1872, before the statement by Pulfrich of the latency explanation for the binocular intensity-difference depth displacement. (Dvorak, V •• Ueber Analoga der personlichen Differenz zwischen beiden Augen und den Netzhautstellen desselben Auges.…”

Decision-making in second-eye cataract surgery: can presence of Pulfrich phenomenon help?

“…[25][26][27] Studies have shown that, compared with normal lenses, cataractous lenses transmit only a small fraction of light at all wavelengths. [28][29][30] Zigman et al 30 found that the typical light transmittance of an optically significant human cataract is less than 10% (equivalent to the effect of a 1 log unit NDF).…”