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The phenomenon in question is anisochromatopsia, however this term is rarely used. This phenomenon is always present, however it is rarely mentioned subjectively, while objective color testing will reveal it easily. In pathologic state, the term Color Desaturation is being used defining that the previous status of color vision has changed to "abnormal" one. ...


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Instead of phosphorescence, a more parsimonious explanation is the perception of afterimages. Afterimages regularly appear after viewing a bright stimulus. They occur in the same location in the visual field as the original stimulus, but lack clarity. Afterimages depend on the intensity and contrast of the original stimulus (i.e., they are more pronounced ...


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Short answer Human females do not benefit much from an extra cone class, as color discrimination is hardly affected in most tetrachromats. In fact, tetrachromats often show increased error rates in their color discrimination. In dichromatic New World monkeys the heterozygous females do functionally benefit from their extra cone as they gain trichromatic ...


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A comment by @ddiez made a good point at identifying some ambiguity in the question: sight vs concentration. Sight has been answered well by @Ilan. You can't test to see if someone is squinting to concentrate. I stick by my original comment: Isn't it a social tool to show others you're thinking? It would be difficult to come up with a scientific ...


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The phenomenon in question is probably related to people with uncorrected/undercorrected myopia. This "ancient" phenomenon is called stenopeic slit effect (a case of pinhole effect): when the person squints the visual acuity becomes better because of smaller blur circles: the "slit" between the eyelids is the key point improving blurring. One can check if ...


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I just found a research about possibility of organism with loop DNA (Mostly bacteria) could use there DNA as antenna to transmit and receive radio wave around 1kHz http://www.wired.com/2011/04/bacterial-radio/ But as other said. Communication mostly evolve from sensory organ. So the radio wave has too much noise and could not give useful information about ...



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