Tuesday, January 05, 2010

Contact Lenses Rigid

Contact lenses are thin sheets of plastic with special refractive indexes that help envision the people with some sort of myopic or other vision related illnesses. The contact lenses being used all over the world now are soft and smooth which are very comfortable to wear. Rigid contact lenses are old contact lenses which are pretty outdated these days due to the modern types of contact lenses available today.Rigid contact lenses were made up of Polymethylmethacrylate or "PMMA”, a type of plastic. They were very durable and had excellent vision correction abilities. They became outdated due to two main reasons.