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.
Fatigue. Fatigue is another sign of computer vision syndrome. Looking at a computer screen with untreated vision problems can lead to eye and general fatigue. Overall fatigue from working too long at a computer and concentrating without blinking, combined with poor lighting, can result in vision problems.