With around 135 million people worldwide wearing contact lenses, it’s certainly become a very popular way of correcting a variety of vision impairment problems.
Of course, contact lenses are not all the same; they differ not only with regard to the prescription needs of the wearer, but they can also be made of different materials – making them more or less suitable for every individual.
Contact lenses can be made of hard plastic or a soft gel-like material. The modern hard lenses are also known as rigid gas permeable (RGP) lenses.
