Rigid Gas Permeable Lenses ( RGP )- These types of lenses are beneficial for eyes which need extra oxygen, or if you have a lot of astigmatism. They do take a little longer to adapt to , but they last longer than very soft lenses and are normally replaced on an annual basis. Bifocal and multi-focal lenses are also available in G.T. Harvey & Partners Opticians. http://gtharvey.co.uk/
