Corneal cross-linking (CXL) is a minimally invasive, in-office procedure with no incision that strengthens the cornea by photo-activating riboflavin (vitamin B2) with UVA light. Indicated for documented progressive keratoconus, Kmax change of 1 diopter or more in 12 months. We tailor the protocol (Epi-Off Dresden, Accelerated, Epi-On, or combined CXL+ICRS) to corneal thickness, age, and progression rate. The goal is to stop the disease, vision improvement is a possible bonus.
Why choose us
Pentacam + OCT measurements drive the choice between Epi-Off, Epi-On, Accelerated, or combined CXL+ICRS. We don't run a one-size-fits-all protocol.
9 mW × 10 minutes (Bunsen-Roscoe-equivalent) instead of the 30-minute classic regimen, same biomechanical effect, shorter chair time.
When you need both stabilization (CXL) and shape correction (rings), we do them in a single session, saving travelers a second trip.
We only do CXL when topography shows real, measurable progression, Kmax ≥1 D shift, thinning, or rising astigmatism over 12 months. No CXL for stable corneas.
All three treat keratoconus, but each fits a different disease stage. Corneal topography, not this table, determines the right path.
| Procedure | Starting price | In-clinic duration | Recovery | Best for |
|---|---|---|---|---|
You're here Cross-Linking (CXL) | from $400 / eye | 60 min | 3-5 days | Vision is still good and the goal is to halt progression early, doesn't correct vision, preserves it |
Corneal Ring Segments (ICRS) Details & calculator | from $600 / eye | 20-30 min | 1-2 weeks | Blurry or distorted vision with a not-yet-advanced cone, reshapes corneal curvature to improve image quality |
Corneal Transplant (DALK) Details & calculator | from $2,500 / eye | 30-40 min | 6-12 months | Advanced cone or corneal scarring, replaces the damaged front layers while preserving healthy endothelium |
Vision is still good and the goal is to halt progression early, doesn't correct vision, preserves it
Blurry or distorted vision with a not-yet-advanced cone, reshapes corneal curvature to improve image quality
Advanced cone or corneal scarring, replaces the damaged front layers while preserving healthy endothelium
Prices are estimates per eye in USD, the right procedure for your case is determined by topographic exam, not this table.
When is cross-linking the right step?
Choose the stage that matches you
Diagnosed recently, mild on the scan, with no earlier scans to compare against
A single scan cannot say whether the cornea is changing. Two scans a few months apart can, and that is what settles the question of cross-linking.
Scans over several months show the cornea steepening or thinning
This is the point where cross-linking has a job to do. It is done to stop the change itself, not to improve the glasses prescription.
Very thin cornea, a scar, or vision that has dropped noticeably
Cross-linking on its own is not enough here. The scan shows whether there is still enough thickness to pair it with something else, or whether a different route makes more sense.
Orientation only. Your corneal scan (Pentacam and topography) decides whether cross-linking is the right step, not this page.
Book a corneal assessmentKeratoconus found during a LASIK check? Dr. Ahmed Shaarawy explains what that means, when cross-linking alone is enough, and when rings or lenses are added depending on the stage.
Procedures & pricing
Final cost is set after clinical examination. Local-currency equivalents available on request. Insurance reports issued for international patients.
| Procedure | Best for | From (USD) |
|---|---|---|
| Accelerated CXL (Epi-Off) | Intensified protocol, 60-minute session, 1 eye. Same total UVA dose, faster delivery. | $400 - $560 |
| Standard CXL (Epi-Off / Dresden) | Classic 90-minute Wollensak/Dresden protocol, strongest evidence base, 1 eye. | $500 - $700 |
| Trans-Epithelial CXL (Epi-On) | Epithelium kept intact, faster recovery, less discomfort, selected cases only. | $600 - $800 |
| Combined CXL + ICRS (single session) | Gold standard for progressive keratoconus that needs both stabilization and shape correction. | $1,200 - $1,800 |
A patient with moderate keratoconus on the weeks after her corneal ring implant, with her mother on the fears they had beforehand. Rings can be combined with cross-linking in the same session.
Common questions
Pick a day and time. The first visit is an eye exam with Dr. Ahmed Shaarawy, who tells you which option suits your eyes.
Recent corneal topography (Pentacam, OCT, or corneal map) plus your refraction is enough for an initial assessment. Reply within 24 hours with whether CXL alone, CXL+ICRS combined, or another protocol is the right call, and the full price.
Is this how you see the world?
Drag the divider to compare healthy vision with what a keratoconus patient sees. If the image looks like what you experience, it's time for a specialist diagnostic exam.
The light itself stays visible but smears into a tail and repeats two or three times, one of the earliest KC symptoms
Read this text clearly
A healthy cornea is the key to clear vision
Read this text clearly
A healthy cornea is the key to clear vision
Ghosting and double letters, as if every word is printed on top of itself
Wavy, distorted letters, won't sharpen with regular glasses alone
Early diagnosis lets cross-linking stop the cone before vision is lost for good
What does cross-linking actually do?
Move the slider to watch the cornea steepen and thin over time, then try applying cross-linking at any stage.
Healthy cornea
The corneal surface is regular and its thickness is normal.
Early stage
Part of the cornea starts to thin and bulge, and the glasses prescription may change often.
Moderate stage
The bulge grows and vision gets blurrier, even with glasses.
Advanced stage
At a late stage, rings or a transplant may be needed. The exam decides which.
Without cross-linking, steepening and thinning can continue.
Cross-linking stops the cone at this stage. It does not return the cornea to its original shape.
Illustration only. A corneal scan (Pentacam) decides the stage and the treatment.
