In earlier days, lenses were made up of hard acrylic and they were very costly where normal people could not afford enough money. As the Science and technology started developing in a very good pace, older type of  lenses were replaced by silicon surface types. The quality of the visibility started to improve and many people began to use the contact lenses.

You can find plenty of contact lens making companies around the world. You find lots of them by surfing on the web itself. One among those websites to be mentioned is Kontaklinsen. It provides an vast range of contact lenses like, rigid lenses, daily disposable lenses, monthly lenses, colored lenses and so on.