Daily Disposable contact lenses are used for one day, then thrown away. They typically don’t involve the use of lens solutions. Frequent Replacement lenses are reused for two weeks to one month (depending on the lens and your Optometrist’s recommendation) and require cleaning and disinfection every day. Extended Wear means you can sleep in the lenses for up to six nights/seven days (based on your Optometrist’s recommendation). Some lenses are approved for even longer wearing periods, but we believe a shorter wear cycle, and more frequent use of fresh lenses, is more comfortable.