Contact lenses are medical devices that have been shown to be very safe. However, there are certain risks and complications that may occur. Mild complications include: discomfort, corneal abrasion, watery eyes, mild redness, dryness and light sensitivity. The risks of serious infection due to microbial keratitis are associated with poor compliance. Less than 1 in 3 people are complaint with lens care and wearing instructions. Approximately 75% of wearers fail to 'rub' their contact lenses with multi-purpose solutions. Contact lens wearers should never use tap water with their lenses. Almost 1 in 3 cases of Acanthameoba infection are associated with swimming whilst wearing lenses. Please do not swim in contacts! Clean your case daily with contact lens solution to avoid a build-up of biofilm which can compromise disinfection. Most patients are advised to only wear contact lenses during the day. Sleeping in contact lenses increases the risk of serious eye infection by 10 times. Always replace lenses on time. Never wear contact lenses that are past their expiry date. If you experience any problems, ask yourself, "is my eye red?" "is my eye painful?" "has my vision reduced?" If the answer is "yes" to any of these, remove your contact lenses and call your eye-care practitioner immediately.