The VeinViewer works by projecting a harmless near-infrared light onto the skin, which is absorbed by the blood, and reflected onto surrounding tissue. This information is captured and processed through a computer that then projects a real-time LED image of the veins onto the skin. The VeinViewer can “see” veins up to 10mm below the skin, and can define individual lines to an impressive level of detail—0.22mm.
Read more: Brilliant VeinViewer makes it easier (and less painful) to find a patient's vein | Inhabitat - Sustainable Design Innovation, Eco Architecture, Green Building