Optical Interaction between Retinal Receptors

Wijngaard, W.; Heyker, H.

doi:10.1007/978-3-642-80934-7_10

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…The interpretation offered here supposes that light escapes one cone to the extracellular space before entering another. An alternative is that some of the socalled recaptured light passes directly from one cone to another, as by mode coupling (Wijngaard & Heyker, 1975). However, Wijngaard and Hyeker's computations (1975) lead them to conclude that mode coupling is not significant for the human fovea.…”

Section: Mode Couplingmentioning

confidence: 99%

Light capture by human cones.

Chen

Makous

1989

The Journal of Physiology

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SUMMARY1. The variation in visual efficiency of light with varying pupillary entry (the Stiles-Crawford effect) was measured to determine the proportion of light incident on the cones that escapes them without recovery by other cones.2. The variation in delectability of interference fringes with varying pupillary entry of the interfering beams was measured to determine the proportion of incident light that was recaptured by cones in the dark stripes after escaping cones in the bright stripes of the fringes.3. By exclusion, these observations determine the variation, with varying pupillary entry, in the proportion of incident light that was captured and absorbed by the first cones it entered.4. Some 70-90

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Section: Mode Couplingmentioning

confidence: 99%

Light capture by human cones.

Chen

Makous

1989

The Journal of Physiology

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Theoretical Consideration of Optical Interactions in an Array of Retinal Receptors

Wijngaard¹

1981

Springer Series in Optical Sciences

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Why do green rods of frog and toad retinas look green?

Govardovskii

Reuter

2014

J Comp Physiol A

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Amphibian “green” rods express a blue-sensitive cone visual pigment, and should look yellow. However,when observing them axially under microscope one sees them as green. We used single-cell microspectrophotometry (MSP) to reveal the basis of the perceived color of these photoreceptors. Conventional side-on MSP recording of the proximal cell segments reveals no selective longwave absorbing pigment explaining the green color. End-on MSP recording shows, in addition to the green rod visual pigment, an extra 2- to 4-fold attenuation being almost flat throughout the visible spectrum. This attenuation is absent in red (rhodopsin) rods, and vanishes in green rods when the retina is bathed in high-refractive media, and at wide illumination aperture. The same treatments change the color from green to yellow. It seems that the non-visual pigment attenuation is a result of slender green rod myoids operating as non-selective light guides. We hypothesize that narrow myoids, combined with photomechanical movements of melanin granules, allow a wide range of sensitivity regulation supporting the operation of green rods as blue receptors at mesopic-to low-photopic illumination levels.End-on transmittance spectrum of green rods looks similar to the reflectance spectrum of khaki military uniforms. So their greenness is the combined result of optics and human color vision.

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Optical Interaction between Retinal Receptors

Cited by 3 publications

References 16 publications

Light capture by human cones.

Light capture by human cones.

Theoretical Consideration of Optical Interactions in an Array of Retinal Receptors

Why do green rods of frog and toad retinas look green?

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