What is a scleral lens?
A scleral lens is a large-diameter, gas-permeable contact lens that rests on the sclera and vaults over the cornea, creating a fluid reservoir that both improves optics and protects the ocular surface.
It is an effective, non‑surgical option for patients with keratoconus, post‑operative corneal irregularities, high astigmatism or severe dry eye when conventional contact lenses do not provide satisfactory vision or comfort.
Indications & visual rehabilitation
Keratoconus and corneal dystrophies: Scleral lenses smooth irregular corneal surfaces and often restore functional vision without surgery.
Post‑surgical irregularities: Surface irregularities after LASIK, PRK or corneal transplant can often be rehabilitated with a scleral lens.
High astigmatism & post‑traumatic deformities: Scleral lenses can reduce double vision and blurring caused by scarring or trauma.
Therapeutic & protective uses
Severe dry eye disorders: In conditions such as Sjögren’s or Stevens–Johnson syndrome, the fluid reservoir helps protect the cornea and reduce pain.
Neurotrophic keratitis & epithelial defects: Scleral lenses shield non‑healing corneal wounds and support epithelial regeneration.
Chemical burns & surface inflammation: They isolate the cornea from the environment, maintain moisture and support faster healing.
Fitting process & follow-up
- Measurements: Corneal topography and scleral profile analysis are used to determine the best base curve and diameter for each patient.
- Trial & adaptation: Edge pressure, centration and the tear reservoir are evaluated by slit-lamp and/or microscopic examination during fitting.
- Follow-up & care: Early follow-up is important in the first weeks; long-term lens care, disinfection and sterile saline use are essential.
Fitting and suitability should be determined by an experienced eye specialist; patient instruction and regular follow-up visits are vital.
Benefits of scleral lenses
Improved visual quality
They neutralize irregular corneal surfaces and can provide clarity not attainable with glasses.
Continuous hydration
The tear reservoir keeps the corneal surface moist, reducing pain and irritation.
Protective barrier
They isolate the cornea from the environment in chemical, mechanical or dry‑eye related injuries.
Non-surgical solution
For many patients, it provides long-term relief without the need for corneal transplantation or advanced surgery.