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Blinking is a bodily function; it is a semi-autonomic rapid closing of the eyelid. [1] A single blink is determined by the forceful closing of the eyelid or inactivation of the levator palpebrae superioris and the activation of the palpebral portion of the orbicularis oculi, not the full open and close.
The primary disorder is benign essential blepharospasm, in which term the qualifier essential indicates that the cause is unknown. Blepharospasm may occur as secondary to conditions including dry eyes and other specific ocular disease or conditions, Meige's Syndrome and other forms of dystonia, and Parkinson's Disease and other movement disorders.
Flicker vertigo, sometimes called the Bucha effect, is "an imbalance in brain-cell activity caused by exposure to low-frequency flickering (or flashing) of a relatively bright light."
The corneal reflex, also known as the blink reflex or eyelid reflex, [1] is an involuntary blinking of the eyelids elicited by stimulation of the cornea (such as by touching or by a foreign body), though it could result from any peripheral stimulus. Stimulation should elicit both a direct and consensual response (response of the opposite eye).
Corneal reflex — blinking of both eyes when the cornea of either eye is touched. Coronary reflex; Cough reflex — a rapid expulsion of air from the lungs after sudden opening of the glottis, and usually following irritation of the trachea.
As most cat owners surely know by now, receiving a slow blink from your cat is a great honor; in cat terms, shutting your eyes for any length of times means that you're feeling comfortable in that ...
Frequent blinking exacerbates mechanical dry eye symptoms, while increasing blinking improves symptoms of aqueous tear deficiency dry eye. Diagnosis can be further made under a slit lamp upon the observation of redundant conjunctival folds.
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