Diversity Among Contact Lenses:
Contacts can come in a number of multiplicity, including hard and soft. Hard contacts are typically not disposable, while soft contacts often are. Some soft contacts are also known as extended wear lenses. Contact lenses (both soft and hard) are made of various types of polymers, usually containing some variant of silicone hydro gel. Beforehand, hard contact lenses were made of a polymer known as PMMA. They have since been replaced by rigid gas-permeable (RGP) contact lenses. Many contact lenses are made of hydrophilic (water-absorbing) materials, thereby allowing oxygen to reach the cornea, and make the lens more comfortable to wear.
There are two types of wide-ranging contact lenses. Soft lenses and rigid gas permeable lenses are the two types of lenses. The rigid gas permeable is also known as RGP. Soft contact lenses are easier to wear because they are more moveable than that of RGP. This makes them more comfortable to have in your eyes. The soft lens also allows oxygen flow freely to your cornea leaving your eyes feel better. Rigid gas permeable contact lenses are sturdier and give you better sight making things look clearer. They have a longer life expectancy than that of a soft lens because of their durability. The soft lens and rigid gas permeable both come in a disposable lens. The more popular of the two for disposable contacts is the soft lens. A disposable lens can have a life of seven to thirty days depending on the type and brand of the contact. However, disposable contacts are usually given to those that wear soft contact lenses.
Recently developed Contact Lenses:
There is also an additional class of lenses for those of you have a demanding lifestyle and need your contacts almost all of the time. They are called extended wear lenses. These lenses are soft contact lenses because of the high demand of oxygen your cornea needs. There are however, a few RGP that can be worn as extended wear contact lenses. There is one preceding group of contact lenses. These are known as specialized contact lenses which are known as Ortho-K, helps to change the curve in your cornea helping them with temporary improvement with how your eyes see objects. Ortho-K is not a permanent fix. Without the Ortho-K lenses as a treatment your eyes would still and always keep the curvature of the cornea.
A person who wears contact lenses knows there is daily concern for your contacts and for your eyes that you should follow. At all times have a pair glasses around to fall back on just in case you would lose a contact or the contact would start irritating your eyes. Washing your hands before putting your contacts in helps with reducing infection.