caa a22 4500 465777554 CHVBK 20180323111946.0 cr unu---uuuuu 170327e19900501xx s 000 0 eng 10.1007/BF00920032 doi (NATIONALLICENCE)springer-10.1007/BF00920032 Cone interaction and color substitution as revealed by pattern ERG [Elektronische Daten] [Georg Niepel, Arvi Päärmann, Eberhard Dodt] Transient electroretinograms to a reversing color-contrast checkerboard pattern (P-ERG) were recorded in a protanomalous, a deuteranomalous, and a normal observer. Alternate monochromatic checks were of constant wavelength (630 rim. red - 531 nm green), while the relative energies were varied systematically. When changing the radiance ratio 630 nm-531 nm of the stimulus, the normal subject exhibited a P-ERG to all stimuli with only a relative amplitude minimum at a distinct radiance ratio, whereas the color-deficient observers failed to show a P-ERG at some color contrast 630 nm-531 nm, the radiance ratio of which was different in the protan and deutan. From the radiance ratio of color contrast for the smallest potential in the normal observer, we conclude that the green- and red-sensitive cone mechanism provides a difference signal which generates the response. The data from the color-deficient observer support the view that color discrimination in protans and deutans is reduced because the input of one type of photoreceptor is missing. Springer-Verlag, 1990 Niepel Georg Max-Planck-Institut für physiologische and klinische Forschung, W.G. Kerckhoff-Institut, Bad Nauheim, Germany aut Päärmann Arvi Max-Planck-Institut für physiologische and klinische Forschung, W.G. Kerckhoff-Institut, Bad Nauheim, Germany aut Dodt Eberhard Max-Planck-Institut für physiologische and klinische Forschung, W.G. Kerckhoff-Institut, Bad Nauheim, Germany aut Graefe's Archive for Clinical and Experimental Ophthalmology Springer-Verlag 228/3(1990-05-01), 264-269 0721-832X 228:3<264 1990 228 417 https://doi.org/10.1007/BF00920032 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00920032 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Niepel Georg Max-Planck-Institut für physiologische and klinische Forschung, W.G. Kerckhoff-Institut, Bad Nauheim, Germany aut NATIONALLICENCE 700 1- Päärmann Arvi Max-Planck-Institut für physiologische and klinische Forschung, W.G. Kerckhoff-Institut, Bad Nauheim, Germany aut NATIONALLICENCE 700 1- Dodt Eberhard Max-Planck-Institut für physiologische and klinische Forschung, W.G. Kerckhoff-Institut, Bad Nauheim, Germany aut NATIONALLICENCE 773 0- Graefe's Archive for Clinical and Experimental Ophthalmology Springer-Verlag 228/3(1990-05-01), 264-269 0721-832X 228:3<264 1990 228 417 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer