Millions of people use contact lenses daily for comfort and convenience, but small mistakes in lens care can lead to serious eye complications. Many users unknowingly sleep with lenses on, ignore replacement schedules, use tap water for cleaning, or wear lenses longer than recommended. These habits can reduce oxygen flow to the eyes and increase the risk of irritation and infection. Poor lens hygiene can also expose eyes to bacteria and harmful microorganisms that may lead to long-term vision issues. Understanding safe contact lens practices and maintaining proper hygiene can significantly reduce the chances of eye damage while improving overall eye comfort and health.