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Although the deep blue eyes of some people such as Elizabeth Taylor can appear purple or violet at certain times, "true" violet-colored eyes occur only due to albinism. [73] [74] [75] Eyes that appear red or violet under certain conditions due to albinism occur in less than 1 percent of the world's population. [70]
In this image, both RGB and Natural Color System color pairs are provided. It may be necessary to zoom to adjust the image. Some people may be able to see the color "red-green" in this image by letting their eyes cross so that both + symbols are on top of each other. In this image, both RGB and Natural Color System color pairs are provided. It ...
The eyes of albino animals appear red because the colour of the red blood cells in the retina can be seen through the iris, which has no pigment to obscure this. Some albino animals may have pale-blue eyes due to other colour generating processes. Albino vertebrates exposed to intense light typically lose photoreceptors due to apoptosis. [28]
Purple haze refers to a state of mind induced by psychedelic drugs, particularly LSD. [86] Wearing purple is a military slang expression in the U.S., Canada and the U.K. for an officer who is serving in a joint assignment with another service, such as an Army officer on assignment to the Navy. The officer is symbolically putting aside his or ...
Magic Eye is an autostereogram book series. Barberpole illusion: The barber pole illusion is a visual illusion that reveals biases in the processing of visual motion in the human brain. Benham's top: When a disk that has lines or colours on it is spun, it can form arcs of colour. Beta movement
Purple sulfur bacteria produce bacteriochlorophyll a and bacteriochlorophyll b. [11] In cyanobacteria, many other carotenoids exist such as canthaxanthin , myxoxanthophyll , synechoxanthin , and echinenone .
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This is a list of notable people who have been documented as having heterochromia iridis, a condition when the irises have different colours. People who are frequently mistakenly thought to have heterochromia are not included, but may be listed in the Notes section.