Rigid Gas Permeable (RGP) Lenses
RGP lenses are, as the name implies, rigid, but the plastics of which they are made are somewhat more flexible than hard lenses. Newer RGP lenses offer the advantage of allowing more oxygen to pass through to the eye. Sometimes they are referred to as “Oxygen Permeable Lenses”. They are available in daily wear and extended wear options.
RGP lenses have the following advantages and disadvantages:
- Good vision.
- Correct most corneal astigmatism.
- Good durability.
- Good handling characteristics.
- Easier care.
- Less initial comfort than soft lenses.
- Longer adaptation period required than soft lenses.
- More easily dislodged.
- Can scratch and break.
- Intermittent wear less feasible