From
Star Trek: Acronym for
Visual
Instrument and
Sensory
Organ
Replacement.
A remarkable piece of bioelectronic engineering that allowed Geordi La Forge to see, despite the fact that he was born blind. A slim deviece worn over the face like a pair of sunglasses, the VISOR permitted vision in not only vision in not only visible light, but across much of the electromagnetic spectrum including infrared and radio waves.The VISOR, while giving La Forge better-than-normal sight, also caused him continuous pain.