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Blepharospasm is often associated with dry eyes, but the causal mechanism is still not clear. [16] [8] Research in New York and Italy suggests that increased blinking (which may be triggered by dry eyes) leads to blepharospasm. [24] [25] A case control study in China found that blepharospasm aggravated dry eyes. [26]
Tardive dyskinesia is characterized by repetitive, involuntary movements, which occurs following treatment with medication (hence the term tardive). [9] Some examples of these types of involuntary movements include: [10] Grimacing; Tongue movements; Lip smacking; Lip puckering; Pursing of the lips; Excessive eye blinking
This neurological phenomenon is characterized by a sustained dystonic, conjugate, involuntary upward deviation of both eyes lasting seconds to hours. The term oculogyric is applied in reference to the simultaneous upward movement of both eyes, although the reaction may encompass a variety of additional responses. [ 1 ]
Spasm means "uncontrolled muscle contraction". The term blepharospasm ['blef-a-ro-spaz-m] can be applied to any abnormal blinking or eyelid tic or twitch resulting from any cause, ranging from dry eyes to Tourette's syndrome to tardive dyskinesia. The blepharospasm referred to here is officially called benign essential blepharospasm (BEB) to ...
Studies suggest [26] that adults can learn to maintain a healthy blinking rate while reading or looking at a computer screen using biofeedback. Eye blinking can be a criterion for diagnosing medical conditions. For example, excessive blinking may help to indicate the onset of Tourette syndrome, strokes or disorders of the nervous system.
A spasm of accommodation (also known as a ciliary spasm, an accommodation, or accommodative spasm) is a condition in which the ciliary muscle of the eye remains in a constant state of contraction. Normal accommodation allows the eye to "accommodate" for near-vision. However, in a state of perpetual contraction, the ciliary muscle cannot relax ...
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A sense of irritation, discomfort, or pain in the eyes. A tingling sensation behind the eyes or the feeling of grit or sand in the eyes. Excessive tearing that is often made worse by exposure to cold air, wind, or bright lights. Swelling or redness of the eyes. Stare; Lid lag (Von Graefe's sign) Sensitivity to light; Blurring of vision