The Air Optix Aqua for Astigmatism is a highly oxygen permeable contact lens that can be worn for up to a month and is made from the new silicone hydrogel material lotrafilcon B with a water content of 33%. It is used to correct corneal irregularities. The Aqua wetting technology employed here allows the eye's surface to benefit from excellent wetting and therefore makes the lens comfortable to wear for long periods of time. The Air Optix Aqua for Astigmatism lens is also very suitable for wearing in unfavourable circumstances, such as when you're working in front of a computer screen, you're in an air-conditioned environment, or when the air around you is extremely dry.