After a certain period of time, such as a week, or a month, you’ll have to discard them as per instructions. Some lenses last for as little as a single day. Others last for up to two weeks, one month, or a year at a time.

Contact lens prescriptions usually expire in one year. It is essential to have your annual eye exam to make sure your eyes are healthy and that your prescription has not changed. If you are experiencing discomfort, vision problems, or have questions about the safe and proper use of your contact lenses, ask your eye doctor.