There are two basic types of contacts: Hard (also called rigid gas permeable) and soft. Within these categories there are many variations, but let's first look at the basics of each type. Hard lenses are often more durable and more resistant to deposits than soft lenses. Because they usually contain silicone, they can allow more oxygen to reach the eye than some types of soft lenses. However, most people end up going with soft contacts. This is because soft contacts are thought to be more comfortable, flexible and widely available.