What are scleral lenses?
Scleral lenses are large-diameter rigid gas-permeable lenses. They rest on the sclera, the white of the eye, and vault the cornea rather than bearing on it. Before insertion, the lens is filled with sterile, preservative-free saline, creating a fluid layer between the lens and the ocular surface.
Who may benefit?
They may help selected people with keratoconus, post-surgical or post-transplant irregular corneas, and corneal scarring when spectacles or conventional lenses do not provide suitable vision. Diagnosis alone does not determine suitability; ocular-surface health, measurements and a diagnostic trial are essential.
How does scleral lens fitting work?
The visit starts with symptoms, previous reports, refraction and ocular-surface assessment. Corneal maps are reviewed when appropriate. A diagnostic lens is then assessed for corneal clearance, edge alignment, vision and comfort. The delivered lens is reviewed, and practical training covers insertion, removal, cleaning and filling.
Scleral lenses versus corneal RGP lenses
A corneal RGP is smaller and moves on the cornea. A scleral lens is larger, vaults the cornea and rests on the white of the eye. Either may be appropriate in different circumstances; corneal shape, visual quality, comfort and ocular-surface health guide the choice.
Care and follow-up
Use only the cleaning system and filling saline recommended by the practitioner, and never expose the lens or case to tap water. Remove the lens and seek advice for pain, persistent redness, discharge or a sudden drop in vision. See the lens-care solutions guide for related information.
Scleral lens services in Oman
Specialised assessment is available in Al Buraimi, with selected follow-up options coordinated through the NVO branch network. Send your reports through WhatsApp so the team can guide you to the suitable branch and appointment option.
Scleral lens questions
What is the difference between scleral and corneal RGP lenses?
A corneal RGP lens is smaller and moves on the cornea. A scleral lens is larger, rests on the white of the eye and vaults the cornea with a fluid layer beneath it. Examination and trial fitting determine the suitable option.
Can scleral lenses be used after a corneal transplant?
They may be an optical option in selected post-transplant cases, but corneal shape, graft health and the ocular surface must be assessed, with ophthalmology input when required.
Do scleral lenses stop keratoconus progression?
No. Scleral lenses correct vision but do not stop progression. Corneal imaging follow-up and an ophthalmologist's decision about cross-linking are separate.
How many hours can scleral lenses be worn?
Wearing time varies with eye health, lens design and individual response. The practitioner sets a gradual schedule after fitting, and the lenses should not be worn during sleep unless specifically prescribed.