Contributions of Rods and Cones to Visual Thresholds During Dark Adaptation,
PENNSYLVANIA UNIV PHILADELPHIA DEPT OF PHYSIOLOGY
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The spectral sensitivity of the retinal receptors may deviate appreciably from that which would be assigned to them on the basis of either scotopic or photopic luminosity standards. Both the initial cone branches and the secondary rod branches of dark adaptation curves were found to deviate from predicted positions on a scotopic scale of luminance. These results illustrate the importance of empirical evaluations in any situation where the most efficient use of illumination may be essential. In the design of a cockpit lighting system for example, serious errors may be introduced by dependence upon luminosity standards for the determination of energy levels required for visual tasks under various spectral conditions of illumination.
- Anatomy and Physiology