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Children under behavior therapy are taught of various techniques and ways with regard to their disorder. After such, they're then taught on the way to apply them on different situations where and when their symptoms may attack. Therapists believe in the adage praoclaiming that practice makes perfect. The latter statement brings hope to the youngsters as well as their parents that the disorder is not a lifelong illness but instead may ultimately be cured if observance in the recommendations of the doctors addressing the symptoms of compulsions and obsessions will be keenly followed. Sunglasses allow better vision in bright daylight, and may protect one's eyes against damage from high levels of ultraviolet light. Typical sunglasses are darkened for protection against bright light or glare; some specialized glasses are clear in dark or indoor conditions, but turn into sunglasses when in bright light. Most sunglasses do not have corrective power in the lenses; however, special prescription sunglasses can be ordered. Specialized glasses may be used for viewing specific visual information (such as stereoscopy) or 3D glasses for viewing three-dimensional movies. Sometimes glasses with no corrective power in the lenses are worn simply for aesthetic or fashion purposes. Even with glasses used for vision correction, a wide range of designs are available for fashion purposes, using plastic, wire, and other materials. Drag racing has profusely seeped in the world?s car culture. A sanctioned legal type of racing done on the drag strip, it is just a sport where cars race down a track using a set distance inside the fastest possible time while precisely attentive to specific guide lights and tuned in to strict lane regulations with respect to the rules agreed for that game.