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blink the involuntary movement of one or both eyelids of both eyes simultaneously. The frequency varies between species. Cats blink the least, with the possible exception of owls. In birds it is the lower eyelid which is moved up to meet the upper lid. In mammals the upper eyelid is moved down to meet the lower lid. The blink is a part of several reflexes including the palpebral, conjunctival and menace reflexes. blink reflex see blink response. blink response
absent in lesions of the ophthalmic branch of the trigeminal nerve. Called also blink reflex. 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. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Maliki would have become the most important figure in Iraq in the blink of an eye, the one person everyone would have had to deal with. Because of the wealth of detail and the nature of Hitler's strategy, the novel is slow-moving, yet it provides an interesting record of how life can change, not so much in the blink of an eye, but so gradually that people are slow to recognize what they have given up--which is, of course, always an interesting parallel for modern times. 9/05), once more opens his fantastical cabinet of invention, this time for a foray to the island-bound city Orokos, where probability storms change the topography or the inhabitants in the blink of an eye. |
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