Monthly contact lenses are typically the standard choice with contact lens wearers. As with daily contact lenses, the wearer must remove monthly lenses before sleeping. The difference is that they must be stored in a special contact lens case after being thoroughly cleaned with contact lens solution. The advantage of these lenses is they are normally cheaper than the daily option. With monthly lenses, the wearer is responsible for keeping them clean every day. This is because certain types of bacteria are harmful to the eye and can cause long term problems with vision.
Daily contact lenses are worn for one day and then disposed of. The advantages of daily lenses include that they do not require cleaning, unlike monthly lenses. Moreover, you do not need to bring your contact lens case or contact lens solution with you on an overnight trip. You simply dispose of your current lenses (responsibly!) and insert new ones the next day. Daily lenses do tend to be slightly more expensive than monthly lenses. This is only if you plan on wearing your daily lenses every day. If you only wish to wear contact lenses every other day – or even just at the weekend! – then the price is reasonable.
You can wear extended wear contact lenses non-stop for an extended period: some lenses for seven days and some for a month. Many people find these lenses ideal because they can insert them and then forget about them until they have to be removed. The wearer must be aware that this kind of contact lens is not perfect for everybody. On the other hand, some people might find it quite uncomfortable to wear lenses for such a long time.