BrainPort is a technology whereby sensory information can be sent to one's brain through an electrode array which sits atop the tongue. It was initially developed by Paul Bach-y-Rita as an aid to people's sense of balance, particularly of stroke victims. Bach-y-Rita founded Wicab in 1998.
It has also been developed for use as a visual aid, demonstrating its ability to allow a blind person to see his or her surroundings in polygonal and pixel form. In this scenario, a camera picks up the image of the surrounding, the information is processed by a chip which converts it into impulses which are sent through an electrode array, via the tongue, to the person's brain. The human brain is able to interpret these impulses as visual signals and they are then redirected to the visual cortex, allowing the person to "see." This is similar in part to how a cochlear implant works, in that it transmits electrical stimuli to a receiving device in the body.  
The BrainPort V100 oral electronic vision aid was approved by the Food and Drug Administration (FDA) on June 18, 2015.
- Prather, Laura (15 February 2007). "Tongue creates sight for blind: Visually impaired persons will be able to use device to sense images on tongue" (PDF). Truman State University Index. 98 (20): 11. Retrieved 2009-05-24.
- Wicab retrieved 4 October 2009
- Article briefly discusses the use of the BrainPort as a balance aid for stroke victims.
- BrainPort, Dr. Paul Bach-y-Rita, and Sensory Substitution, 23 November 2004
- How Stuff Works: How BrainPort works retrieved 4 October 2009
- Can you see with your tongue? Discover Magazine published 1 June 2003
- "Press Announcements - FDA allows marketing of new device to help the blind process visual signals via their tongues". www.fda.gov. Retrieved 2016-02-14.
- P. Bach-y-Rita, P., M. E. Tyler, and K. A. Kaczmarek. "Seeing with the brain." In press, Int. J. Hum. Comp. Interact, 2001.
- P. Bach-y-Rita, K. A. Kaczmarek and M. E. Tyler, "A tongue-based tactile display for portrayal of environmental characteristics," in Psychological Issues in the Design and Use of Virtualk and Adaptive Environments, L. Hettlinger and M. Haas, Eds. Mahwah, NJ: Erlbaum, in press.
- K. A. Kaczmarek and M. E. Tyler, "Effect of electrode geometry and intensity control method on comfort of electrotactile stimulation on the tongue," Proc. ASME Dyn. Sys. Contr. Div., Orlando, Florida, pp. 1239-1243, 2000.
- A similar system (PDF)