One day or daily disposable lenses are, like the name states, lenses that you only use for one day, to then be disposed of at the end of the day. Every day you open a new set of fresh lenses and therefore won't have to bother about cleansing, lens fluid and storage. If you like to vary your use of lenses with glasses the one day disposable lens is the ideal for you. The best thing about one day disposable lens is that you will never need to worry about lens fluid.