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.
See also: Computer vision syndrome FAQ â¢ Computer glasses â¢ About dry eyes â¢ 7 things you're doing at your desk that will give you eye strain. With so many of us using computers at work, computer eye strain has become a major job-related complaint.