The VISOR is an apperatus that attaches to sensors that - in turn - attach to the visual cortex, allowing someone who is blind to see. Some VISOR models allow a person to also see different wavelengths, such as ultra-violet and other types of radiation.Enterprise-Eengeneer Geordi LaForge was born blind, and used a VISOR until he recived an operation which gave him sensors at the back of his eyes.