Proper care of contact lenses. Remember - Contact Lenses are declared by the FDA to be a Medical device so treat them like one! Contact lens related eye infections can happen suddenly - you may have never have had an eye infection due to your misuse but one day wake up with one of these. They require alot of time to get rid of, can cause pain, don't look pretty, and can cause vision loss. (Some organisms cause infection that can affect vision permently within 48 hours).