Scleral Lenses: The Gold Standard for Irregular Corneas

Scleral contact lenses are large-diameter rigid gas permeable lenses that vault over the entire corneal surface and rest on the sclera — the white of the eye. Unlike conventional contact lenses, they do not touch the cornea at all. This unique design makes them the preferred solution for some of the most challenging corneal conditions in specialty eye care.

How Scleral Lenses Work

A scleral lens creates a fluid-filled reservoir between the lens and the cornea. This vault serves two critical functions:

• Optical — the smooth lens surface replaces an irregular cornea, providing crisp, stable vision regardless of underlying corneal distortion
• Therapeutic — the fluid layer continuously bathes the cornea, protecting it from dryness and mechanical irritation

The lens edge rests on the conjunctiva overlying the sclera, which is far less sensitive than the cornea, resulting in exceptional comfort even for patients who could not tolerate other lens types.

Who Benefits Most?

Keratoconus and Corneal Ectasia

When glasses no longer provide adequate vision and standard soft or RGP lenses are uncomfortable or unstable, scleral lenses often deliver the best combination of visual acuity and wear time.

Post-Surgical Corneas

Patients with irregular astigmatism following LASIK, PRK, radial keratotomy, or corneal transplant frequently achieve functional vision only with scleral lenses.

Severe Dry Eye Disease

Conditions such as Sjögren's syndrome, graft-versus-host disease, Stevens-Johnson syndrome, and exposure keratopathy benefit from the constant corneal hydration scleral lenses provide.

Ocular Surface Disease

Scleral lenses act as a protective barrier for sensitive corneas affected by chemical burns, neurotrophic keratitis, or chronic surface inflammation.

The Fitting Process

Scleral lens fitting is a specialty procedure requiring advanced training, precision instrumentation, and often multiple follow-up visits:

1. Corneal topography and OCT — mapping the corneal surface and measuring vault requirements
2. Diagnostic lens trial — assessing fit, centration, vault depth, and edge alignment
3. Over-refraction — determining the optimal power for maximum visual acuity
4. Customization — ordering lenses with precise parameters for each eye
5. Dispense and follow-up — fine-tuning fit and educating on insertion, removal, and care

At SPECTICO, scleral fitting is performed by clinicians with dedicated training in specialty contact lenses, using advanced imaging to ensure safe vault and healthy corneal physiology.

Care and Handling

Scleral lenses require diligent hygiene:

• Fill lenses with non-preserved saline before insertion
• Use approved cleaning and disinfection solutions nightly
• Replace cases and solutions as directed
• Attend all scheduled follow-ups to monitor corneal health

Insertion and removal have a learning curve, but most patients become proficient within the first week with proper instruction.

Common Questions

Are scleral lenses comfortable?
Yes — most patients report scleral lenses are more comfortable than RGP lenses because the lens does not contact the cornea.

How long can I wear them?
Many patients wear scleral lenses 12–16 hours daily. Your clinician will set safe wear schedules based on your ocular surface health.

How long do they last?
With proper care, scleral lenses typically last one to two years before replacement is needed.

Will insurance cover them?
Coverage varies. Medical necessity documentation for conditions like keratoconus or severe dry eye may support coverage — our team can guide you through the process.

Is a Scleral Lens Right for You?

If you have been told your cornea is too irregular for standard contacts, or if chronic dryness makes lens wear impossible, scleral lenses may be the solution. A specialty contact lens consultation can determine candidacy and set realistic expectations for visual outcomes and the fitting timeline.