Photo has been used for illustrative purposes.
If you stare at a computer monitor or cellphone too long and then experience temporary blurry vision, it's likely because the moisture layer on the front surface of your eye is getting dry.
"If that tear film is not smooth and even, and of the right quality and quantity, vision does tend to be compromised. So, people may notice that they have clear vision one moment, they blink, and it gets blurred. They blink again, and it gets clear," says Dr. Muriel Schornack, a Mayo Clinic optometrist.
Blinking spreads important tears over the front surface of the eye.
"Whenever we're doing anything that requires distinct attention to visual detail, our blink rate goes down," says Dr. Schornack.
Instead of a normal blink rate of every five to seven seconds, you might only blink every 15 to 20 seconds when looking at a screen.
"Blinking is huge. It's hugely important. It can go a long way toward keeping us more comfortable. It's obviously inexpensive, and it's readily available," says Dr. Schornack.
Next time you find yourself staring at a screen, try the 20-20-20 rule. "Every 20 minutes, look at something 20 feet away, blink 20 times for 20 seconds," she says.
Using over-the-counter eye drops periodically throughout the day also can help.
Tribune News Service
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