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.
These can be caused by irritation of the surface of the eye (cornea) or the membranes lining the eyelids (conjunctiva). Sometimes, the reason your eyelid is twitching cannot be found. This form of eyelid twitching lasts much longer and is often very uncomfortable. It can also cause your eyelids to close completely. Repeated uncontrollable twitching or spasms of your eyelid (most often the upper lid)