It is very inconvenient wearing heavy eyeglasses, especially in summer, playing on beach. At some occasions, it’s not suitable for wearing frame glasses. So contact lenses become the first choice of women instead of sunglasses. Contact lenses let most myopic sufferers enjoy convenience when they wear them and at the same time they enjoy the handsome pleasure.

However, some people wear contact lenses for a too long time that they even do not take them off when they go to sleep. in fact, you can’t wear contact lenses for over eight hours every day. There are some ads about long effective contact lenses, it's said that people can wear them for a week without taking them off. Actually, it's unscientific drumbeating. Had better not wear contact lenses overnight. It’s ok to wear in the day and take off at night. No contact lenses can meet full ventilation, even the best cannot.

If the cornea is lack of oxygen for too long, mould would easily grow and therefore cause infection. As the contact lenses is not taken off at night, it can not be cleaned timely, dirt like dust in the air may accumulate on the contact lenses, which may easily cause conjunctiva infection. A lot of people have the habit of napping, if the condition permits, remove contact glasses in the soaking solution, wear contact lenses again after washing. By this way, your eyes and body can rest and relax at the same time, thus creating chance for your eyes to breath. It is necessary to wash after waking up, impurities and dust in the eyes will be cleared out, which is more conductive to health and eye protection.

Worse still, some people don't take off contact lenses when bathing. Shampoo and bath liquid immerse in the eyes and pollute the lens, which causes eye irritation. Someone who taking a bath even drop contact lenses in the bathtub. Therefore, it’s advised that people should not wear contact lenses or men sunglasses when taking a shower or bath.

Besides, new wearers are advised not to wear contact lenses for a long time, usually 4 to 5 hours are appropriate a day. Once your eyes feel sore and tired, put contact lenses off. You should adjust slowly.