Most people don’t think of contact lenses as a medical device. But poor habits can set you up for serious eye infections that can damage vision or even cause blindness. Contact lenses provide safe and effective vision correction for an estimated 40 million Americans. However, studies show that most contact lens wearers have at least one bad habit that puts them at risk of vision loss. The American Academy of Ophthalmology recommends following these eight steps to protect your sight from contact lens infections.