He proposed that light sources could be rated in scotopic
lumens as well as conventional photopic lumens.
Recent research results have provided for the development of a method to account for the visual system's changing spectral response as adaptation moves through the mesopic range as it passes from photopic to scotopic
[Rea and others 2004; Elohoma and Halonen 2006; CIE 2010].
Since very few marine species are known to have long-wavelength sensitivity at scotopic
light levels, the implications of the spectral shifts at these wavelengths are unknown.
Noteworthy among these is the 5577-angstrom line, which affects the V and photopic bandpasses much more than it does the scotopic
Figure 1 presents a familiar example, the scotopic
10,11) However, most studies have reported declines in both photopic and scotopic
contrast sensitivity with aging.
Rod-mediated visual function can be quantified using a variety of psychophysical tests including the plotting of the dark adaptation curve, absolute scotopic
sensitivity measurement and dark-adapted visual acuity and contrast sensitivity.
You do rate the scotopic
lumens as about two times that, but still.
To place those results on a quantitative basis they were empirically fit successfully by a combination of photopic and scotopic
The pairing of black and white is often confused with the dark and light of scotopic
Studies in the literature concerning BCD have reported pathologic ERG responses at non-detectable levels, (1,12,13) a- and b-wave amplitude attenuation on scotopic
strong flash ERG, (14) reduced rod b-wave amplitude, (1,15) attenuated a- and b-wave amplitudes on photopic ERG, (15,16) decreased 30-Hz flicker amplitude, (1,16) and abnormal S-cone ERG findings.
18) Further assessment is essential, and includes electroretinogram (ERG) testing, which shows a classic pattern of reduced scotopic
amplitudes and initial selective b-wave reduction consistent with inner retina damage.