![]() | This ![]() It is of interest to the following WikiProjects: | |||||||||||||||||||||||||||||||||||||||||||||||||
|
From the article "while the outer segment, which is pointed toward the front of the eye, contains the light-absorbing materials" Don't the cells point away from the front of the eye, from the neural layer into the pigment-containing outer layer? The light has to travel through blood vessels and neurons in the neural layer to get to the rod and cone cells. NoQuarter —Preceding undated comment added 14:56, 14 May 2006 (UTC)
What is the spectral response curve of a rod cell? As I understand it, the CIE color matching functions are approximately the response of the three colors of cones. What would the corresponding curve look like for rods? —Ben FrantzDale 02:17, 10 July 2007 (UTC)
the article about cone cell states there are about 90 million rod cells in the eye, with a citation needed on it. 79.181.128.44 ( talk) 15:05, 1 October 2008 (UTC).
Uhm, did somebody leave off editting here? (Under Desensitization) 71.200.46.113 ( talk) 22:16, 28 December 2008 (UTC)
"This fact is responsible for the Purkinje effect, in which blue colors appear more intense relative to reds at twilight, when rods take over as the cells responsible for vision." Does it mean that rod cells make blue-green sensation? Or they only give uncolored (white) sensation as I was thought in school? What "more intense" does mean? Do the blue parts appear more bluish in the dark or simply more bright? -- MathFacts ( talk) 09:14, 14 December 2009 (UTC)
Apparently the Retinal molecule is the primary light-sensitive molecule in animal vision. Does anyone know how many active retinal molecules are present in a single rod cell, or are present in a single cone cell? Frysay ( talk) 05:53, 30 May 2014 (UTC)
The diagram of the rod cell says that there are "membrane shelves lined with rhodposin or colour pigment". First of all, these are disks not shelves. Check the literature. Second of all, diagrams should have brief labels not sentences. "Discs containing rhodopsin" is quite sufficient. "Colour pigment" adds nothing to the diagram. If people want to know what rhodopsin is, they can easily look it up.
Sorry if I sound like I'm griping. I do appreciate those who make these public domain images. Lehasa ( talk) 19:04, 12 July 2017 (UTC)
The caption for the last figure designates "Wavelength responsiveness:, while the vertical axis reads "absorbance". These are different concepts. Certainly absorption of light by the sensor cell is necessary for a neuronal response, but is insufficient. Compare this figure with the first figure of Spectral sensitivity, where the shapes of the three curves for cone cells appears to be different, but similar to the scotopic curve in the first figure of Luminosity function. Layzeeboi ( talk) 03:04, 26 February 2019 (UTC)
Neither this article nor the Article Photopic vision gives a clear answer to the question whether rod cells play any (supportive) role in photopic (daytime) vision or whether they're basically inactive under well-lit conditions. Please add. -- 194.39.218.10 ( talk) 08:53, 30 November 2021 (UTC)
![]() | This ![]() It is of interest to the following WikiProjects: | |||||||||||||||||||||||||||||||||||||||||||||||||
|
From the article "while the outer segment, which is pointed toward the front of the eye, contains the light-absorbing materials" Don't the cells point away from the front of the eye, from the neural layer into the pigment-containing outer layer? The light has to travel through blood vessels and neurons in the neural layer to get to the rod and cone cells. NoQuarter —Preceding undated comment added 14:56, 14 May 2006 (UTC)
What is the spectral response curve of a rod cell? As I understand it, the CIE color matching functions are approximately the response of the three colors of cones. What would the corresponding curve look like for rods? —Ben FrantzDale 02:17, 10 July 2007 (UTC)
the article about cone cell states there are about 90 million rod cells in the eye, with a citation needed on it. 79.181.128.44 ( talk) 15:05, 1 October 2008 (UTC).
Uhm, did somebody leave off editting here? (Under Desensitization) 71.200.46.113 ( talk) 22:16, 28 December 2008 (UTC)
"This fact is responsible for the Purkinje effect, in which blue colors appear more intense relative to reds at twilight, when rods take over as the cells responsible for vision." Does it mean that rod cells make blue-green sensation? Or they only give uncolored (white) sensation as I was thought in school? What "more intense" does mean? Do the blue parts appear more bluish in the dark or simply more bright? -- MathFacts ( talk) 09:14, 14 December 2009 (UTC)
Apparently the Retinal molecule is the primary light-sensitive molecule in animal vision. Does anyone know how many active retinal molecules are present in a single rod cell, or are present in a single cone cell? Frysay ( talk) 05:53, 30 May 2014 (UTC)
The diagram of the rod cell says that there are "membrane shelves lined with rhodposin or colour pigment". First of all, these are disks not shelves. Check the literature. Second of all, diagrams should have brief labels not sentences. "Discs containing rhodopsin" is quite sufficient. "Colour pigment" adds nothing to the diagram. If people want to know what rhodopsin is, they can easily look it up.
Sorry if I sound like I'm griping. I do appreciate those who make these public domain images. Lehasa ( talk) 19:04, 12 July 2017 (UTC)
The caption for the last figure designates "Wavelength responsiveness:, while the vertical axis reads "absorbance". These are different concepts. Certainly absorption of light by the sensor cell is necessary for a neuronal response, but is insufficient. Compare this figure with the first figure of Spectral sensitivity, where the shapes of the three curves for cone cells appears to be different, but similar to the scotopic curve in the first figure of Luminosity function. Layzeeboi ( talk) 03:04, 26 February 2019 (UTC)
Neither this article nor the Article Photopic vision gives a clear answer to the question whether rod cells play any (supportive) role in photopic (daytime) vision or whether they're basically inactive under well-lit conditions. Please add. -- 194.39.218.10 ( talk) 08:53, 30 November 2021 (UTC)