The spectral sensitivity of blue-sensitive pigeon cones: evidence for complete screening of the visual pigment by the oil-droplets.
The relative spectral sensitivity of blue-sensitive pigeon cones was determined using flicker-photometry based on mass ERG-responses from intact subjects during high-level light adaptation. The resulting spectral sensitivity curve can be mimicked by a P460 nomogram screened by an oil-droplet that absorbs 50% at 466 nm. Comparison of the curve with the nomogram indicates that on the average less than 10% of the light that excites the blue-sensitive cones is guided past or diffracted around their oil-droplets.
D000221:Adaptation, Ocular; D000818:Animals; D003118:Color Perception / Q000502:physiology*; D010856:Columbidae / Q000502:physiology*; D004596:Electroretinography; D005425:Flicker Fusion / Q000502:physiology; D009821:Oils; D010786:Photoreceptor Cells / Q000502:physiology*; D012168:Retinal Pigments / Q000502:physiology*
D009821:Oils; D012168:Retinal Pigments