It heats the air it zips through to five times the surface temperature of the sun. Still, around 90 percent of lightning-strike victims survive. Over the past three decades, lightning has killed an average of 51 people per year in the U.S. but left more than 500 injured and alive.
Computer vision syndrome. Computer vision syndrome (CVS) is a condition resulting from focusing the eyes on a computer or other display device for protracted, uninterrupted periods of time.
Australia : New Centre's sights on robotic vision. This malady is known as computer vision syndrome, and there is a health care strategy to combat the problem called 20/20/20: every 20 minutes the computer user should take a break for at least 20 seconds and look at objects that are 20 feet away.