RGP Lens
RGP lens (hard lens)
A lens made of an oxygen-permeable acrylic compound with a diameter smaller than the cornea.
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- RGP lens (hard lens)
What is a hard lens?
A lens made of an oxygen-permeable acrylic compound with a diameter smaller than the cornea.
It moves with blinking so tears circulate well and the eye does not dry; it is a suitable lens when dry eye is present.
Correction is also excellent in high astigmatism, and unlike soft lenses a hard lens must match each person's ocular shape, so it should be purchased after accurate testing.
Features of RGP lenses (hard lenses)
- 01
Excellent oxygen permeability
- 02
Helpful for dry eye
- 03
Good astigmatism correction
- 04
Long use period (2–3 years)
- 05
Relief of lens-related side effects
| Category | Soft lens | Hard lens |
|---|---|---|
| Material | Soft material | Rigid material |
| Vision-correction effect | Good | Good |
| Astigmatism-correction effect | Incomplete | Good |
| Oxygen permeability | Low | Good |
| Lens lifespan | Under 1 year | Average 2 years |
| Wear time | 8 hours or less recommended | Can be worn for 10 hours |