In the Blink of an Eye

Closeup of brown eyesWe’ve all used the figurative expression, “in the blink of an eye.” But, have you ever thought about how fast the blink of an eye actually is?

According to the National Eye Institute, when you blink, you shut your eyes for 0.3 seconds – that’s 30 minutes a day. However, it doesn’t disrupt vision and often occurs without us even noticing it. Blinking is the periodic contraction of the eye muscle. Its purpose is mainly two-fold, to keep the eyes moist and to clear away dust particles. Blinking also helps to protect the eye from potentially damaging stimuli, like bright lights.

Sources: National Eye Institute

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