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.
These days, many of us have jobs that require us to stare at computer screens for hours at a time. That can put a real strain on your eyes. Eye problems caused by computer use fall under the heading computer vision syndrome (CVS). It isnât one specific problem. Instead, it includes a whole range of eye strain and pain. Research shows that between 50% and 90% of people who work at a computer screen have at least some symptoms.