RGP

Rigid Gas permeable lenses, also known as 'hard' lenses, because the material they are made of is hard and not very flexible, are gas permeable which means they allow oxygen to pass through the lens to the eye.

RGP lenses are very durable and economical and are suitable for correcting most refractive problems. RGP lenses however do require more perseverance to adapt to the feeling of the lens on the eye.

RGP lenses are usually the first lenses of choice in cases of moderate to severe astigmatism and Keratoconus or other cases with extensive corneal distortion i.e. after corneal graft surgery or severe injury.

These lenses require specialist fitting and follow up, in order to avoid compromise to the integrity of the eye or vision. Careful cleaning and care of the lenses is essential. As with all contact lenses RGP lens wearers are recommended to have an annual contact lens eye examination with their optometrist.