We’ve all heard of 40 winks but what about 20 blinks? That’s apparently how often per minute we should all be opening and closing our eyes to keep them fresh.
Experts this week warned office workers sitting in front of a screen could be damaging their eyes because they aren’t blinking enough.
People naturally blink 20 times a minute but a survey has revealed that the rate drops between one and three times when staring at a computer.
Blinking helps to keep our eyes moist and free of dirt and when we don’t do it enough that can lead to blurred vision, dry eyes and headaches.
So how often is normal and healthy for other everyday things like chewing, nose-blowing, crying or sex?
According to experts at Columbia University, if your hair is normal or dry, you should only wash it once or twice a week. Read more