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The real question is, is the sky blue for everyone? Some creatures can see ultraviolet. Some lack color at all…
by reactordev 8mo ago
The real question is, is the sky blue for everyone? Some creatures can see ultraviolet. Some lack color at all…
- mncharity 8mo agoI puttered on a color interactive where, to emphasize this distinction between world-spectra vs brain-color, you could swap in color deficiencies, a non-primate mammal ( dichromats), and a monochromat.
- reactordev 8mo agothis is fascinating because I'm red/green color deficient yet I have no problem seeing most reds or greens. I feel there's a "spectrum" of color that we all see and each of us is slightly different. My shade of green may not be your shade of green. Yet, when I point out my shade of green - it matches your shade of green because of our eyes. Even though we may be perceiving entirely different colors.
- AlotOfReading 8mo agoMost colorblind people aren't dichromats, they're so-called anomalous trichromats. Basically, the genes coding opsins in your eyes have a number of functional sites that tune the spectral sensitivity. Those sites are tuned as far apart as they can be in color-normal humans. Anomalous trichromats usually have a genetic error that causes their opsins' sensitivity curves to overlap more, which manifests as reduced color sensitivity.
- reactordev 8mo agoThis occurs in other animals as well.
- mncharity 8mo agoImagine a chromaticity diagram, but on a perceptual color space where long-range euclidean distance at least attempts to describe the magnitude of perceived difference (rather than the usual model artifacts) - so round-ish. Then decreasing perceived difference between red and green shows up as a smush to oval.
- daedrdev 8mo agoSome animals have more cone types than humans, especially various birds, so would probably see a violet sky. We don't have this because common ancestor for all mammals lost all cones but one, perhaps due to being nocturnal, and a second was re-evolved as mammals became more dominant (after dinosaur extension). A third cone was evolved in primates due to a gene duplication that gave us our green cone https://www.sciencedirect.com/science/article/pii/S004269890800148X https://www.sciencedirect.com/science/article/pii/S004269890...
- reactordev 8mo agomaybe in 100M years we'll get a 4th cone or rod. Probably from nuclear mutation...
- jaggederest 8mo agoWe already have mutations, generally in women, for tetrachromaticism, who usually have male relatives with severe or moderate color blindness, in which the X chromosome encodes a different green cone. So they end up seeing red, strange-green, green, and blue, where strange-green is somewhere closer to red than green. Only a few on record but they tend to have absolutely insane color matching and color perception. One of note worked in the fashion industry and could match fabrics perfectly even in varying lighting (e.g. working under fluorescent but able to match colors that would stay matched in halogen/stage lighting)
- reactordev 8mo agoI have that already ;) it actually looks like muddy puke green than green. However, green stop lights look more “white” than green. Some reds look like brown. I hate reds. I’m not sure about the Pantone-like color matching but I definitely see different colors than most people. To the point where my flight license is restricted. Dichromatic but not trichromatic.
- codesnik 8mo agohow does dichromatism restricts flight license? no instrumental flights? no night flights? something about perceiving warning lights on some panels?
- goatlover 8mo agoHow would Lieutenant Geordi La Forge from ST Next Generations see the sky with his visor?
- reactordev 8mo agoYou know that scene with the Nexus ribbon? Probably a huge version of that. But it depends on what timeframe we’re talking. Visor Geordi or Eye Optics Geordi?