Loss of vision is something most of us will experience to different degrees and different times in our lives. Most of us gradually lose vision as we age while others will experience loss due to genetics, disease, or injury. Work is constantly being done to find a way to prevent or cure blindness. Microchip eye implant technology has been one way and advancement is moving along. Nano Retina is one of those companies working on this technology and they hope to do clinical trials by 2013.