blink

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blink

(blink),
To close and open the eyelids rapidly; an involuntary act by which the tears are spread over the conjunctiva, keeping it moist.
Synonym(s): wink

blink

(blingk)
To close and open the eyes rapidly; an involuntary act by which the tears are spread over the cornea and conjunctiva, keeping it moist.

blink 

A temporary closure of the eyelids (usually of both eyes). Blinks are usually involuntary but may be voluntary. The frequency of blinking is conditioned by a number of external and internal factors, e.g. glare, wind, emotion, attention, tiredness, etc. Normal blink rate is about 10 blinks per minute, although there are wide variations. The duration of a full blink is approximately 0.3-0.4 s. Blink rates are often altered with contact lens wear and in some diseased states (e.g. chalazion, Graves' disease). See corneal reflex; wink.
References in periodicals archive ?
In the present study, where participants blinked for only a very short time, no effects on perceived puff intensity were found, but EMG measures indicate an increasing sensitivity to the air puffs or, at least, a lack of habituation to the puffs.
They noticed audiences waited for the action to slow then all blinked at the same time.
This meant that the light falling on the retina in the eye remained constant even when the participants blinked. The scientists were then able to measure the effects of blinking on brain activity independently of the effect of eyelid closure on light entering the eye.
He said the IRA man turned Education Minister used to make his skin crawl because he never blinked.
It seems like you haven't blinked in ages, but of course that's not possible.