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.
If you look at bright light or spend time in a place thatâs too dim, it can also tire your peepers. Your eyes might get tired easily if you stare for long periods at a computer, smartphone, or game console. The eye doctor might call this computer vision syndrome or digital eye strain. It affects most people who use one. Some estimates say computer-related eye symptoms may be responsible for up to 10 million eye doctor visits a year.