article_snippet: A Memphis-based company uses infrared light to look 'under' the skin.
article_snippet: Device works by emitting near-infrared light, which is absorbed by hemoglobin in the blood and then reflected by surrounding tissue.
article_snippet: VeinViewer (shown) works by emitting near-infrared light, which is absorbed by hemoglobin in the blood and then reflected by surrounding tissue.
article_snippet: Device works by emitting near-infrared light, which is absorbed by hemoglobin in the blood and then reflected by surrounding tissue.
highlights_snippet: A Memphis-based company uses infrared light to look under skin .
  