We've run a few of these before, but if you think we're into otherwise unnecessary implantables, don't even get us started on implantables that enhance sensory perception, or restore senses where there were once none. The New Scientist has a writeup of a new kind of solar powered 1.5 millimeter x 15 micrometer retinal implant that could start restoring vision to the blind by using solar cells to trigger lead zirconate titanate piezoelectric actuators that stimulate optical neurotransmitters. Yeah, we slapped our foreheads too, it was so simple. You'll have Laxman Saggere of the University of Illinois at Chicago to thank when his invention is complete, though; we can't wait to give Stevie a peek -- the man wrote Songs in the Key of Life, can't he just get a peek?