The more advanced contact lenses, such as Night and Day contacts, will allow you to wear them all day and all night. Just like other contacts however, you will still need to clean them on a regular basis to ensure that the protein is removed. Contact lens designs The designs for contacts are divided into three areas - toric, spherical, and multi-focal. There are different manufacturers that produce different types of bifocal contact lenses, meaning that it may take you a bit of research and experimenting to find which type works the best for you. Some lenses however, are made with a unique design, known as concentric. Similar to concentric circles, there are two adjustments - one in the middle the other around the outside. They won t fall off or slide down your nose when you run, nor will they limit what you can do when you play sports. Another bad thing about glasses is the fact they need to match what you wear. If you have casual frames, they may not suit your evening attire. The colors may also clash, which is a bad thing for those who crave style. When this happens, the contact will draw moisture from the tears in your eyes, which results in dryness. If the contact lens contains a lot of water, then it is almost guaranteed to lose moisture throughout the day. With dryness being a common problem for most people who wear contact lenses, manufacturers are always working to create contacts that will remain comfortable throughout the day. If you have the money to spare, you would be better off getting a pair of brand name contacts. On the other hand, if you are on a limited budget, cheap contact lenses would do you good - at least until you get the money to buy one of the better brands. Cheap contacts can be found on the Internet, or at your local optician s office. Colored lenses work exactly the same as traditional contacts, and won t damage your eyes as long as you clean them and take care of them. If you clean them like you should and soak them in solution for a few hours when you take them out, you shouldn t have anything to worry about. Each and every colored contact has the color or design coded on the contact itself.