Without unilaterally colorblind subjects and binocular matching, how would we test what color blindness looks like to them? My intuition tells me that since in reality colors are not "pure" wavelengths, certain colors would be brighter/dimmer depending on their composition? Or do the cone cells pick up all wavelengths at the same sensitivity in colorblind people?
kkkhanl
how are we abled to measure this wavelength perceived by the eye?
milesturin
I wonder how the brain learns to compensate for differences between the two eyes. It is well known how when one sense is dampened, the brain learns to compensate in fascinating ways, often by heightening other senses. Would this person end up seeing a similar image in each eye due to this?
rsha256
What is the difference between trichromatic and Deuteranopic eyes?
Staffyirenng
In this experiment, a very rare subject who has regular trichromatic color in one eye and deuteranopic (color blind by missing or abnormal M cone cell function) in the other eye. The subject is show monochromatic wavelength in the deuteranopic eye and adjusts a different, monochromatic wavelength of light in the normal eye until the two look identical. This shows that the subject matches all spectral colors in the color-blind eye to wavelengths in the normal color vision eye that are blue-ish and yellow-ish.
Staffyirenng
For regular color-blind subjects, there are many ways to test for color vision deficiency. (Note, there are also multiple types of color vision deficiency, not just red-green color blindness.) An Ishihara color test booklet is one example. An anomaloscope is another.
One way to test that is related to topics covered later in this lecture: you can have the subject perform a color matching function experiment. Regular trichromat viewers need three matching color primaries to perform the color matching function test. Deuteranopes (and generally subjects with functionally only two types of cone cells) will require only two matching color primaries.
bennyd87708
This discussion reminded me of the theories around the idea of tetrachromacy, a seemingly quite rare condition providing access to a fourth type of cone/receptor in the eyes. I remember being fascinated with the idea of being able to see so many more colors like how it was mentioned in lecture how we can only imagine we would react if able to see the difference, similarly to how deuteranopic persons react to wearing the glasses. Unfortunately, I can't seem to find any good data on it now besides some vague, obscure articles and references. Maybe it was a hoax, maybe it's too rare to be studied enough, or maybe the fourth cone just didn't end up helping all that much.
Without unilaterally colorblind subjects and binocular matching, how would we test what color blindness looks like to them? My intuition tells me that since in reality colors are not "pure" wavelengths, certain colors would be brighter/dimmer depending on their composition? Or do the cone cells pick up all wavelengths at the same sensitivity in colorblind people?
how are we abled to measure this wavelength perceived by the eye?
I wonder how the brain learns to compensate for differences between the two eyes. It is well known how when one sense is dampened, the brain learns to compensate in fascinating ways, often by heightening other senses. Would this person end up seeing a similar image in each eye due to this?
What is the difference between trichromatic and Deuteranopic eyes?
In this experiment, a very rare subject who has regular trichromatic color in one eye and deuteranopic (color blind by missing or abnormal M cone cell function) in the other eye. The subject is show monochromatic wavelength in the deuteranopic eye and adjusts a different, monochromatic wavelength of light in the normal eye until the two look identical. This shows that the subject matches all spectral colors in the color-blind eye to wavelengths in the normal color vision eye that are blue-ish and yellow-ish.
For regular color-blind subjects, there are many ways to test for color vision deficiency. (Note, there are also multiple types of color vision deficiency, not just red-green color blindness.) An Ishihara color test booklet is one example. An anomaloscope is another.
One way to test that is related to topics covered later in this lecture: you can have the subject perform a color matching function experiment. Regular trichromat viewers need three matching color primaries to perform the color matching function test. Deuteranopes (and generally subjects with functionally only two types of cone cells) will require only two matching color primaries.
This discussion reminded me of the theories around the idea of tetrachromacy, a seemingly quite rare condition providing access to a fourth type of cone/receptor in the eyes. I remember being fascinated with the idea of being able to see so many more colors like how it was mentioned in lecture how we can only imagine we would react if able to see the difference, similarly to how deuteranopic persons react to wearing the glasses. Unfortunately, I can't seem to find any good data on it now besides some vague, obscure articles and references. Maybe it was a hoax, maybe it's too rare to be studied enough, or maybe the fourth cone just didn't end up helping all that much.