Dermo-optical perception
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Dermo-optical perception (DOP, also known as dermal vision, dermo-optics, skin vision, skin reading, finger vision, cutaneous perception, digital sight, and bio-introscopy[1]) is a term that is used in parapsychological literature to denote the alleged capability to perceive colors, differences in brightness, and/or formed images through the skin (without using the eyes, as distinct from blindsight), especially upon touching with the fingertips.
Typically, people who claim to have dermo-optical perception claim to be able to see using the skin of their fingers or hands. People who claim to have DOP often demonstrate it by reading while blindfolded. The effect has not been demonstrated scientifically.[2][3]
Paroptic vision[4] – also known as paroptic sense,[5] eyeless vision, eyeless sight,[4] para-optic perception, extra-optical vision[4] or extra-retinal vision[5] (not to be confused with extra-retinal information, an unrelated neuroscientific concept) – is a broader term referring to the alleged ability to perceive visual phenomena by any means without the light from the scene entering the eyes.[4] Besides DOP it includes for example the ability to see an object enclosed by a box that is impervious to light.