Spectral sensitivity functions of post-receptoral responses in human vision

The Journal of Physiology
I M HendricksV A Waterfield

Abstract

1. Increment threshold illumination levels, It, for visual detection of a one-dimensional, spatially periodic test pattern (i.e. a grating) presented to the right eye have been measured following a period of adaptation to high contrast patterns. The right (test) eye was adapted to a grating, matched in bar-width and orientation to the test grating, and the left eye was adapted to a two-dimensional matrix array of circular spots. It is shown that the value of It is dependent on the spatial and spectral parameters of the spot matrix. 2. The variation of It with change in matrix wavelength, lambda, is greatest for matrix spots of some 10-15 min of arc diameter. 3. Values of It were determined as a function of the matrix wavelength, lambda. Three kinds of spectral response have been observed, each associated with a different stimulus geometry, and each characterized by the wavelength, lambda, for which It is minimum. With an adaptation matrix consisting of coloured spots on a dark surround, It is minimum for values of lambda around 600 nm, whereas with a matrix of dark spots on a coloured surround, the minimum occurs for lambda around 520 nm. The third spectral response is found when a blue test grating is superimposed on a yellow ...Continue Reading

Citations

Jan 1, 1988·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·K H Ruddock, W D Wright
Feb 7, 2004·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Pascual CapillaJesús Malo
Jan 1, 1997·Perception·A Morland

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