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Wearing Contacts for Too Long
Vice-O-Meter: 3

The Harm:
A 2011 study found that as many as 67 percent of contact wearers use their lenses for longer than the manufacturer recommends. But remembering to switch to a new pair is worth the effort: About one-quarter of the "noncompliant" study subjects reported symptoms ranging from conjunctivitis to corneal abrasion. Even with regular cleaning, contacts may become coated with proteins, lipids, and environmental irritants, all of which can lead to a variety of complications.

The Cure:
Go to and sign up for Acuminder, a free service that sends you an automatic reminder via e-mail or text when it's time to open a new pack.
As a reminder, always consult your doctor for medical advice and treatment before starting any program.