Disposable soft lenses are the most popular contact lenses prescribed in the United States. These lenses are worn for a period of time and then thrown away. Disposables may be designed to last for one day, two weeks, or one month. Monthly or Bi-weekly contact lenses need to be cleaned and stored at night. Daily disposables are perfect for many patients who were told they could not wear contact lenses because of allergies or mild dry eye conditions. They have a low cost per lens and are also popular for athletes and hobbyists who do not necessarily want to wear contact lenses every day.