Under conditions of night, or scotopic, vision, the frequencies may be as low as four per second.
For modeling photopic and scotopic vision, this operator uses TVI functions.
A computational model is designed to simulate multiple features of mesopic vision and scotopic vision, including the chromaticity change, luminance change, and visual acuity loss.
In other words, due to the existence of rods and cones in our retina, human visual system can accommodate the large variation by changing between scotopic vision and photopic vision.
The human visual system exhibits different characteristics depending on the illumination intensity, with photopic vision in bright conditions, scotopic vision in dark conditions, and mesopic vision between these two.
Beside the potential effect of horizontal cell impairment on scotopic vision additional effect can be hypothesized.
The low sensitivity of the TKO ERG indicates that this residual rod opsin response cannot support conventional scotopic vision.
Lack of electrical coupling between AII amacrine cells and a population of ON cone bipolar cells may affect the sensitivity of scotopic vision [9].
Disproportionate loss of photopic vision as compared to scotopic vision was postulated to be caused by light scattering by the corneal lipid deposits.
The superior limit (50 pA) corresponds to the approximate saturation value for scotopic vision [39] but the inferior limit (10 pA) is above the sensitivity threshold, which can be as low as 1 pA for a single photon detection [14].
The in silico investigation described in this work has shown that rod-rod coupling via gap junctions, in combination with appropriate values of the maximal rod Ih current conductance, enhances the dynamic range of scotopic vision in the vertebrate retina.
