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idioretinal light

an illusion of shades of gray observed in a dark environment. The effect is caused by chemical changes in the retina or brain cells rather than by the wavelength of visible light.

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Psychology term of the day

January 28th 2025

thermoanesthesia

thermoanesthesia

n.

1. loss or absence of the ability to distinguish between heat and cold by touch.

2. insensitivity to heat. Also called thermanesthesia.