Rod hue biases produced on CRT displays

Buck, Steven L.; Juve, Ryan; Wisner, David; Concepcion, Aldebert

doi:10.1167/11.15.30

Cited by 2 publications

(5 citation statements)

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“…Rod and cone photoreceptor signaling under mesopic illumination is multiplexed in post-receptoral neural pathways and this provides both a neurophysiological basis for interactions between the photoreceptor signals (Daw, Jensen, & Brunken, 1990;Lee, Martin, & Gr¨unert, 2010;Polyak, 1948) and subserves interactions that alter mesopic visual function (Barbur & Konstantakopoulou, 2012;Buck, Juve, Wisner, & Concepcion, 2012;Cao & Lu, 2012;Feigl, Cao, Morris, & Zele, 2011;Zele, Kremers, & Feigl, 2012). Two illumination dependent pathways convey the rod signals to post-receptoral ON and OFF pathways.…”

Section: Introductionmentioning

confidence: 99%

Rod and cone pathway signaling and interaction under mesopic illumination

Zele¹,

Maynard²,

Feigl³

2013

Journal of Vision

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This study investigates the time-course and post-receptoral pathway signaling of photoreceptor interactions when the rod (R) and three cone (L, M, S) photoreceptor classes contribute to mesopic vision. A four-primary photostimulator independently controls photoreceptor activity in human observers. The first experiment defines the temporal adaptation response of receptoral (L-, S-cone, rod) and post-receptoral (LMS, LMSR, +L-M) signaling and interactions. Here we show that nonopponent cone-cone interactions (L-cone, LMS, LMSR) have monophasic temporal response patterns whereas opponent signals (+L-M, S-cone) show biphasic response patterns with slower recovery. By comparison, rod-cone interactions with nonopponent signals have faster adaptation responses and reduced sensitivity loss whereas opponent rod-cone interactions are small or absent. Additionally, the rod-rod interaction differs from these interaction types and acts to increase rod sensitivity due to temporal summation but with a slower time course. The second experiment shows that the temporal profile of the rod signal alters the relative rod contributions to the three primary post-receptoral pathways. We demonstrate that rod signals generate luminance (+L+M) signals mediated via the MC pathway with all rod temporal profiles and chromatic signals (L/L+M, S/L+M) in both the PC and KC pathways with durations >75 ms. Thus, we propose that the change in relative weighting of rod signals within the post-receptoral pathways contributes to the sensitivity and temporal response of rod and cone pathway signaling and interactions.

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Section: Introductionmentioning

confidence: 99%

Rod and cone pathway signaling and interaction under mesopic illumination

Zele¹,

Maynard²,

Feigl³

2013

Journal of Vision

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“…This foveal rod green bias was observed in a higher proportion of observers than in prior foveal studies [7,8,10]. Likely, our testing of a larger number of observers—eight compared to three in the prior studies—provided a more precise incidence estimate and reduced the role of chance sampling distortions.…”

Section: Discussionmentioning

confidence: 58%

“…This is a matter of practical concern for investigators studying foveal color vision at lower light levels with CRT or similar displays. It is not clear how high the light level must be to be sure of avoiding foveal rod hue biases but extrafoveal rod hue biases occur at luminances up to at least 2.6 cd/m 2 for some observers [10]. …”

Section: Discussionmentioning

confidence: 99%

“…The background was black (zero level for each gun, at least a factor of 10 4 cd/m 2 below test level). Low mesopic test stimulus levels, such as the present, have been demonstrated to maximize rod influence but still allow sufficient cone function for reliable hue-balance settings for most observers [10–12]. A black foam board surrounded the CRT display, to eliminate stray light from the room.…”

Section: Methodsmentioning

confidence: 99%

“…This laboratory recently published the first study of rod hue biases on stimuli presented on a CRT display [10]. For large, extrafoveal stimuli, all three rod hue biases were found, and the rod blue bias was confirmed for unique red as well as unique green for the CRT display.…”

Section: Introductionmentioning

confidence: 99%

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Rod hue biases for foveal stimuli on CRT displays

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Buck

2013

J. Opt. Soc. Am. A

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Signals from rod photoreceptors bias (shift) the hues determined by cone photoreceptors for extrafoveal mesopic stimuli, creating green, blue, and red rod hue biases at long, middle, and short wavelengths, respectively. The fovea contains far fewer rods and S cones but may not be immune to rod hue biases. Here, we determine the biases found for mesopic foveal stimuli presented on a CRT display. The rod green bias was observed at unique yellow for all but one observer with 2° tests and persisted for most observers with 0.5° tests. The rod red bias typically seen at unique blue in extrafoveal studies was not apparent for either size of foveal test stimulus, and it was sometimes replaced by a rod green bias. The rod blue bias typically seen at unique green and unique red in extrafoveal studies was weak on average and inconsistent for both sizes of foveal test stimuli. Thus, small mesopic foveal stimuli permit rod influence on M- and L-cone color pathways but disadvantage rod influence on S-cone pathways, perhaps because of the sparseness of foveal S-cones. However, some observers did show idiosyncratic foveal rod hue biases that do not follow the general trends.

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Rod hue biases produced on CRT displays

Cited by 2 publications

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Rod and cone pathway signaling and interaction under mesopic illumination

Rod and cone pathway signaling and interaction under mesopic illumination

Rod hue biases for foveal stimuli on CRT displays

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