Dermo-optical perception, or bio-introscopy is the alleged ability to perceive light and color through the skin. Those who declare the possession of such skills often claim that they are able to recognize colors or even read the text with your fingers on each hand.
Dermooptyka is regarded as a phenomenon on the borderline pseudoscience and parapsychology, there is no credible scientific theory, which dopuszczaĆaby existence of such phenomena, it has not been well demonstrated in conditions allowing the exclusion of fraud.