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Contact lenses are applied directly on the surface of the eyes. The risks of wearing them include infection, irritation, dry eyes, blurry vision, and blindness in extreme cases. Lenses can also scratch the eyes, fall out, or trap particles, which causes pain. It is important to keep lenses clean, moist, only in as long as directed. Different Types There are several options for contact lenses in Australia . Wear times range from daily disposal lenses, to those that are designed to stay in place for up to three-months. In between there are lenses that are worn for one-week, two-weeks, and one-month. Top brands have lines specifically designed for multi-focal lenses, lenses for astigmatism, and colored prescription lenses. Non-prescription lenses are available. Proper Use Once a type of lens is selected, routine care is explained to the wearers of that particular brand. One critical aspect of proper lens use is the total time the lenses are worn. Contacts cannot be worn past th