THEORY AND MEASUREMENT OF VISUAL MECHANISMS
Open Access
- 19 July 1944
- journal article
- review article
- Published by Rockefeller University Press in The Journal of general physiology
- Vol. 27 (6), 513-528
- https://doi.org/10.1085/jgp.27.6.513
Abstract
Flicker contours from vertebrates (fishes to man) show that the slope parameter σ'log I in the efficiently descriptive probability summation 100 F/Fmax. = ∫–inf;log I e–(log I/Ii)–(log I/Ii)2/2(σ')/2(σ')2 ·d log I is distributed bimodally (simple fields, "white" light), from 0.60 to 2.3, with well defined peaks at 0.80 and 1.75. This parameter is independent of Fmax., log Ii, temperature, light-time fraction, and in general not greatly influenced by λ. "Rod" components of known visually duplex contours, without exception, and some "cone" contours, are in the first group; an equal number of "cone" curves are in the second group, together with one simplex "rod" contour; purely cone contours are in each group, as well as cone segments of duplex curves. No firm zoological grouping of the "cone" curves can be made, on present evidence,—although the 5 fishes used give high-slope curves, 2 amphibians low slopes, reptiles (5) either high or low, birds (2) and anthropoids (2) low-slope "cone" curves.Keywords
This publication has 20 references indexed in Scilit:
- The spectral sensitivity of the fovea and extrafovea in the Purkinje rangeProceedings of the Royal Society of London. B. Biological Sciences, 1943
- The optomotor responses of some eye mutants ofDrosophilaJournal of Genetics, 1943
- ACHROMATOPSIAArchives of Ophthalmology (1950), 1943
- A Portable Visual AdaptometerJournal of the Optical Society of America, 1941
- Temperature and the Critical Intensity for Response to Visual FlickerProceedings of the National Academy of Sciences, 1938
- On the Duplexity Theory of Visual Response in VertebratesProceedings of the National Academy of Sciences, 1938
- Diurnal changes in the retina of the catfish, ameiurus nebulosusJournal of Comparative Neurology, 1937
- TEMPERATURE AND CRITICAL ILLUMINATION FOR REACTION TO FLICKERING LIGHTThe Journal of general physiology, 1937
- THE DARK ADAPTATION OF THE EYE OF THE HONEY BEEThe Journal of general physiology, 1935
- The Reptilian RetinaAmerican Journal of Ophthalmology, 1934