When standard soft contacts do not provide clear, comfortable vision, specialty lenses may be an option. Both scleral lenses and rigid gas permeable (RGP) lenses are designed to provide sharper vision than soft lenses for certain prescriptions and eye conditions. The right choice depends on your corneal shape, eye health, vision needs, and comfort.
A contact lens exam can help determine which option best fits your eyes and lifestyle.
How are scleral lenses and RGP lenses different?
Both scleral and RGP lenses are made from firm, oxygen-permeable material. Unlike soft contacts, they hold their shape on the eye, which can create a smoother focusing surface and improve vision for people with astigmatism or irregular corneas.
The main difference is size and where the lens rests:
- RGP lenses are smaller and rest directly on the cornea.
- Scleral lenses are larger and rest on the sclera, or white part of the eye. They vault over the cornea and hold a reservoir of fluid between the lens and the eye.
Because scleral lenses do not sit directly on the cornea, they often feel more stable and may be more comfortable for patients with sensitive or irregular corneas.
When might RGP lenses be a good fit?
RGP lenses may be recommended for people who need crisp vision correction for astigmatism, high prescriptions, or vision that is not as sharp with soft contacts. They are durable and, with proper care, may last up to a year.
Because they are smaller, RGP lenses can take time to adapt to. Some people notice lens awareness, particularly during the first few weeks of wear. However, many patients find that the visual clarity is worth the adjustment period.
When might scleral lenses be a better option?
Scleral lenses are often considered for people with keratoconus, corneal scarring, significant dry eye, or other corneal irregularities. Their larger size helps keep them centered and stable, while the fluid reservoir can help protect and hydrate the surface of the eye during wear.
They may be especially helpful if standard contacts move too much, cause discomfort, or do not provide consistent vision. Since scleral lenses are custom-designed, fitting them involves precise measurements and follow-up adjustments.
Which specialty lens is right for you?
Neither lens is automatically better. RGP lenses may be a practical choice when you need sharp vision correction and can comfortably adapt to a smaller rigid lens. Scleral lenses may be a better fit when comfort, lens stability, or protection for an irregular or dry corneal surface is a priority.
A specialty contact lens evaluation includes a review of your prescription, corneal shape, tear film, and overall eye health. From there, your eye doctor can recommend the lens design most likely to provide clear, comfortable vision.
