The effect of luminance of the contralateral steady light upon the foveal threshold was examined in the situation where both test-field and contralateral background (or surround) appeared to be completely fused when both were exposed simultaneously. The relation between the test threshold (defined as log Lt/Lto) and the luminance of the contralateral background (or surround) (I) was expressed by log (Lt/Lto) = a(1 – e−b log 1), where a and b are constants.
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References
1.
AlpernM.RushtonW. A. H.ToriiS.The size of rod signals. J. Physiol. (London), 1970, 206, 193–208.
2.
BattersbyW. S.WagmanI. H.Neural limitations of visual excitability: I. Time course of monocular light adaptation. J. Opt. Soc. Amer., 1959, 49, 752–759.
3.
BeitelR. J.Inhibition of threshold excitation in the human eye. J. gen. Psychol., 1936, 14, 31–61.
4.
BlakemoreC. B.RushtonW. A. H.Dark adaptation and increment threshold in a rod monochromat. J. Physiol. (London), 1965, 181, 612–628. (a).
5.
BlakemoreC. B.RushtonW. A. H.The rod increment threshold during dark adaptation in normal and rod monochromat. J. Physiol. (London), 1965, 181, 629–640. (b).
6.
BoumanM. A.On foveal and peripheral interaction in binocular vision. Optica Acta, 1955, 1, 177–183.
7.
CrawfordB. H.Ocular interaction in its relation to measurements of brightness threshold. Proc. Phys. Soc., B., 1940, 128, 552.
8.
FiorentiniA.BittiniM.Time course of monocular sensitivity during contralateral stimulation. Optica Acta, 1963, 10, 55–57.
9.
FiorentiniA.RadiciT.Sur un effet d'interaction binoculaire. Vision Res., 1961, 1, 244–252.
RushtonW. A. H.GubishR. W.Glare, its measurement by cone threshold and by bleaching of cone pigments. J. Opt. Soc. Amer., 1966, 56, 104–110.
12.
TanakaY.UbmuraY.ToriiS.Decrease and increase in test-threshold luminance induced by a contiguous annular field. Percept. mot. Skills, 1967, 24, 1319–1326.
13.
TornS.UemuraY.Effects of inducing luminance and area upon the apparent brightness of test field. Jap. psychol. Res., 1965, 7, 86–100.
