title: Foveal threshold of one eye when illuminated by contralateral steady light.
abstract: 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 I), where a and b are constants.
mesh_terms: D000221:Adaptation, Ocular; D004056:Differential Threshold; D005584:Fovea Centralis / Q000502:physiology*; D007839:Functional Laterality; D006801:Humans; D008029:Lighting; D008266:Macula Lutea / Q000502:physiology*; D008433:Mathematics; D014785:Vision, Ocular