Now the blink of an eye actually refers to a tenth of a second because that is precisely how long it takes. This is all the time needed to clear away dust particles and spread lubricating fluids across the eyeball. Its quite a useful bit of information that Every time you blink, your eyelids spread a cocktail of oils and mucous secretions across the surface of the eye to keep your globes from drying out. Blinking also keeps eyes safe from potentially damaging stimuli, such as bright lights and foreign bodies like dust.
Ever wondered why everything doesn’t go pitch dark every two to ten seconds?
Scientists have found that the human brain has a talent for ignoring the momentary blackout. The very act of blinking suppresses activity in several areas of the brain responsible for detecting environmental changes, so that you experience the world as continuous.