The PureVision 2 For Astigmatism monthly lens, which is made from silicone hydrogel, offers constant sharp vision with exceptional comfort, meaning that it can be worn for up to 30 days and nights. PureVision2 For Astigmatism lenses reduce halos and glare in bad light, enabling you to see clearly at all times. They also have an excellent stabilising effect on the eye and contain a wetting agent called poloxamine, which ensures they remain comfortable for long periods. In addition, the thin, rounded edge design of these thin toric monthly lenses allow gentle interaction between the lenses and the wearer's eyelids.