What we're seeing in the picture, although it seems a lightsaber taken from a Star Wars movie, is not really meant to be used as a weapon of Jedi combat. Instead, what we see is the replacement for traditional rods, but something far more impressive and useful.Eye Stick is a conceptual cane uses ultrasonic sensors (similar to what the bats) to measure the distance between you and potential obstacles such as a wall, stairs, etc.. The device...
