As everyone is well aware, Levar Burton’s character on Star Trek: The Next Generation -- Geordi LA Forge -- wore a visor. The Bee has learned that VISOR is an acronym and stands for Visual Instrument and Sensory Organ Replacement. Lobot, Lando Calrissian's charming aide pm Cloud City, wore a device that wrapped around the back of his head like modern-day headphones which enabled him to tap into the City’s central computer. Without a silly acronym.
Darth Vader doesn't count because he's more machine than man.
And yes, Luke had his hand replaced, but that's not funny.