The PureVision 2 HD contact lens offers you high-definition vision, i.e. better, sharper vision when your pupils are dilated, which happens in situations such as driving at night. As they are made from balafilcon A, which has high oxygen permeability and a water content of 36%, PureVision 2
lenses can be worn continuously for up to 30 days and 29 nights (24 hours a day) without impairing your eyes' health.
