There are many reasons to elect to wear contact lens, better known as contacts. It could be that you do not wish to wear glasses because you do not like them, or that your can not wear glasses to work. You may wish to change your eye color. Another reason is to alleviate an eye condition or to allow for healing of your eye.
Contacts are tiny plastic discs that are inserted in the eye on the cornea, where they float above the iris. Once you become adjusted to the feeling of a contact lens in your eye, these lens are for the most part comfortable to wear and are unnoticeable to the wearer throughout the course of the day.
Contacts, regardless of function, are made of a polymer. Most commonly used contacts are soft lens, which are made of hydroxyethyl methacrylate; that is a substance that allows for the lens to retain its shape while still absorbing water. Soft lens also allow more oxygen to eye to keep it from drying out and becoming uncomfortable to wear. Some soft lens are made out of silicon. However, contacts made from silicon have a tendency to dry out to due the fact that they do not retain wetness well. Hard contact lens are made of a harder polymer known as polymethyl methacrylate. These contacts require a little bit longer period of adjustment because they allow for less oxygen to reach the eye.
Contact lenses should always be discussed with you eye care physician. He or she will be able to help you choose what is best for your eyes. After a prescription is obtained you can order your lenses through your eye doctor's office or through a commercial site.