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Argyria or argyrosis is a condition caused by excessive exposure to chemical compounds of the element silver, or to silver dust. [ 1] The most dramatic symptom of argyria is that the skin turns blue or blue-gray. It may take the form of generalized argyria or local argyria. Generalized argyria affects large areas over much of the visible ...
The Fugates, commonly known as the " Blue Fugates " [ 1] or the " Blue People of Kentucky ", are an ancestral family living in the hills of Kentucky starting in the 19th century, where they are known for having a genetic trait that led to the blood disorder methemoglobinemia, causing the skin to appear blue.
Blue plaque. A blue plaque is a permanent sign installed in a public place in the United Kingdom, and certain other countries and territories, to commemorate a link between that location and a famous person, event, or former building on the site, serving as a historical marker.
Eye color. Eye color is a polygenic phenotypic trait determined by two factors: the pigmentation of the eye 's iris [ 1][ 2] and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris. [ 3]: 9. In humans, the pigmentation of the iris varies from light brown to black, depending on the concentration of ...
Cyanopsia is a medical symptom and not a sign. It is a purely subjective state and can be caused by a physical or functional abnormality of the eye, a physical or functional abnormality of the brain, or be purely psychological. Cyanopsia, if unaccompanied by any other sign or symptom, is not an indication of any disease or disorder.
Chromostereopsis. Blue–red contrast demonstrating depth perception effects. 3 Layers of depths "Rivers, Valleys & Mountains". Chromostereopsis is a visual illusion whereby the impression of depth is conveyed in two-dimensional color images, usually of red–blue or red–green colors, but can also be perceived with red–grey or blue–grey ...
How people respond to different color stimuli varies from person to person. In a U.S. study, blue is the top choice at 35%, followed by green (16%), purple (10%) and red (9%). [ 34 ] Blue and green may be due to a preference for certain habitats that were beneficial in the ancestral environment as explained in evolutionary aesthetics . [ 35 ]
For instance, since blue jays have loud and unmistakable calls, people think of them as reminders to be clear, straightforward, and communicative. Some see blue jays as special spiritual messengers.