Corneal treatment

Corneal treatment covers the conditions that affect the clear front surface of the eye — keratoconus, Fuchs’ endothelial dystrophy, scarring, recurrent erosion, pterygium and pinguecula. Modern corneal surgery is highly targeted: rather than replacing the whole cornea, surgeons now replace only the diseased layer, or strengthen the tissue that is already there. Most procedures are day cases under local anaesthetic.

Conditions we treat

• Keratoconus. The cornea thins and bulges into a cone, distorting vision. It usually appears in the teens or twenties and can progress. Stabilising it early matters, because cross-linking halts progression but does not reverse damage already done. Read more on keratoconus: symptoms, diagnosis and treatment.
• Fuchs’ endothelial dystrophy. The inner pump layer of cells fails, so fluid builds up and vision turns misty — typically worst on waking. Treated by replacing just that layer, or in early cases by Descemet stripping only (DSO).
• Corneal scarring and recurrent erosion. Scars and repeated breakdown of the surface can follow injury, infection or dystrophy, and often cause pain as well as blurring. Phototherapeutic keratectomy (PTK) can smooth the surface.
• Pterygium and pinguecula. Growths on the surface, associated with sun and wind exposure. A pinguecula is usually cosmetic; a pterygium can creep across the cornea and distort vision, at which point surgical removal with a conjunctival autograft is considered.

How the cornea is assessed

Corneal disease is diagnosed by measuring shape and thickness, not by reading a letter chart. A corneal topography (Pentacam) scan maps the surface in fine detail and is what confirms keratoconus, tracks whether it is progressing, and plans cross-linking or a transplant. Scans are repeated over time, because the question is rarely just “what is it?” but “is it changing?”

Treatments

What is offered depends on which layer of the cornea is affected and how far the condition has progressed.

• Cross-linking (CXL) strengthens the collagen bonds within the cornea to stop keratoconus progressing. It is a stabilising treatment, not a vision-correcting one — see corneal cross-linking costs.
• Corneal ring segments are small implants placed within the cornea to flatten an irregular cone and improve how well vision can be corrected afterwards.
• Scleral and specialist contact lenses vault over an irregular cornea and are often the single most effective way to restore clear vision in keratoconus without surgery.
• Orthokeratology uses overnight lenses to reshape the cornea temporarily, and is also used in children to slow the progression of short-sightedness — ortho-k night lenses for children.

Corneal transplants

Full-thickness grafts are now the exception. Where only one layer has failed, only that layer is replaced, which means smaller incisions, faster visual recovery and a lower risk of rejection than a traditional graft.

• DMEK replaces the innermost endothelial layer with donor tissue just a few cells thick — the usual choice for Fuchs’ dystrophy. See DMEK corneal transplant costs.
• DSAEK replaces the same layer with a slightly thicker graft, which can be the better option for eyes that have had previous surgery.
• DALK replaces the front layers while keeping your own endothelium, used in advanced keratoconus.
• Combined procedures treat a cataract and a failing endothelium in one operation where both are present.

Donor tissue in the UK is supplied through NHS Blood and Transplant eye banks, and the same standards apply whether your surgery is funded privately or by the NHS. If you are weighing the two, current waits are set out in NHS corneal transplant waiting times.

What corneal treatment costs

Costs vary widely because the procedures do — a scan, a stabilising treatment and a transplant are different orders of magnitude. Each cost page below gives an indicative UK 2026 self-pay price, and your written quotation is confirmed after your consultation.