Fluid intake: how coffee and caffeine affect continence. Caffeine is the most widely consumed behaviour-modifying drug in the world. It occurs naturally in about 60 species of plants, most commonly in coffee beans, tea leaves, cocoa seeds and the cola nut (Thomas, 1990; Greener, 1993).
Clinical features of blepharospasm include involuntary eye closing aggravated by bright lights, wind, pollution, smoke, emotional stress, fatigue. This eye closing may interfere with reading, driving, watching television, and other visual activities, and is rarely associated with retro-orbital. pain. Blepharospasm may be associated with other dystonic disorders, such as oromandibular or. cervical dystonia, and usually occurs in the 5th to 7th decades of life.
7 Causes for Eye Twitching. An eye twitch is an involuntary spasm of the eyelid muscle that often happens in the upper lid. The sensation, for most individuals, is that of a gentle tug on the eyelid but some others may experience the twitching to be more of a strong spasm forcing the eye to be completely closed before opening it again. The twitching can last from a few seconds to a few minutes and can come back unpredictably.