Guide to Contact Lenses
- Gas Permeable (GP) Contact Lenses
Also named as GP lenses, rigid gas permeable lenses, RGP lenses and oxygen permeable lenses, gas permeable contact lenses are a type of rigid lenses which are made of oxygen-transmitting durable plastic. Most people may have heard and worn the old-fashioned hard contact lenses which are made of PMMA. Totally different from the outdated hard [...]More...