Scleral Lenses for Keratoconus
A keratoconic cornea is an irregular optical surface, and glasses cannot fix an irregular surface. That is the whole problem in one sentence, and it is why so many people with keratoconus cycle through new prescriptions that never quite work.
A scleral lens solves it differently. Instead of trying to correct your cornea, it replaces your cornea as the surface light passes through.
Dr. Shira Kresch, OD, MS, FAAO fits scleral lenses for keratoconus at Michigan Contact Lens in Southfield, and this is the practice’s core work.
Why glasses and soft lenses stop working
In keratoconus the cornea thins and bulges into a cone. It is no longer a smooth dome, and it is not smooth in a way that follows a regular pattern.
Glasses correct with a fixed lens sitting an inch in front of your eye. They can compensate for a cornea that is too steep, too flat, or regularly astigmatic — a shape that is wrong but predictably wrong. They cannot compensate for a surface that is irregular, because there is no single curve that matches it. You get a prescription that is the best average of a shape with no average, and the result is ghosting, halos, and a dozen edges on every light.
Soft lenses fail for a different reason. A soft lens is flexible, so it drapes over your cornea and adopts its shape — cone included. You have made the surface comfortable without making it smooth, and the distortion still reaches your retina.
If you have been told your prescription “keeps changing” or that glasses are “as good as it gets”, this is usually what is happening. See the difference between worsening astigmatism and keratoconus.
How a scleral lens changes the optics
A scleral lens is large — considerably larger than a conventional contact lens — and rigid. It does three things at once:
- It vaults completely over the cornea. At no point does the lens touch the cone. It arches over it and lands out on the sclera, the white of the eye.
- The gap fills with sterile saline. You fill the lens with preservative-free saline before inserting it, and that fluid stays there all day between lens and cornea.
- Light enters through the lens’s own front surface. That surface is smooth, precisely manufactured, and identical from edge to edge.
Because saline and corneal tissue bend light almost identically, the saline reservoir optically erases the irregularity beneath it. Your cone is still there — it is simply no longer the surface doing the focusing.
This is why the change can be so abrupt. Patients who read letters one at a time in glasses frequently read a full line in a diagnostic scleral lens at the first visit, before any custom lens has been ordered. You can see the effect for yourself with our scleral lens vision simulator.
The saline reservoir does a second job worth knowing about: it keeps the cornea bathed all day. That is why sclerals are also the answer for severe dry eye, and why keratoconus patients who also have a dry, irritated surface often find them a relief rather than a compromise.
Which lens for which stage of keratoconus
Scleral lenses are not automatically the right answer, and a practice that fits only sclerals will tell you they are. The honest version depends on your cornea.
| Your cornea | Usually the best starting point |
|---|---|
| Very early, mild irregularity | Glasses or soft lenses may still be adequate |
| Mild to moderate cone, reasonably central | Corneal RGP or hybrid |
| RGP-intolerant, or a decentred cone | Hybrid or scleral |
| Moderate to advanced cone | Scleral |
| Advanced, steep or very decentred cone | Scleral |
| Keratoconus with significant dry eye | Scleral, for the fluid reservoir |
| After a corneal transplant | Scleral |
The pattern: as the cone steepens or moves away from centre, a lens that rests on the cornea has less and less of a stable surface to sit on. It decentres, it pops out during sport, or it bears down where it should not. A scleral does not care about the shape underneath, because it is not resting on it.
Because we fit rigid, hybrid and scleral lenses, that recommendation can follow your corneal map rather than what we happen to stock. If you have tried lenses before and given up, see hard-to-fit contacts — being hard to fit is usually a statement about which designs have been tried.
What scleral lenses will not do
Worth saying plainly, because it is where most misunderstanding sits.
They do not stop keratoconus progressing. A scleral lens is optical, not therapeutic. It gives you vision through the cone; it does not change the cone. Halting progression is the job of corneal cross-linking, which we do not perform ourselves — we evaluate for it, refer to a corneal surgeon, and fit the lenses afterwards. The two work together, and many patients need both. If your keratoconus is still changing, read how progression is assessed.
They do not remove corneal scarring. If scarring sits in your line of sight, a scleral lens gives you a smooth surface to look through but the light still passes through the scar. Scarring, not cone steepness, is usually what limits the final result — and it is one of the main reasons a corneal transplant becomes the better option.
They are not a cure. Keratoconus is managed, not cured. What a good outcome looks like is stable disease and functional vision — more on that here.
The fitting, and why it takes more than one visit
A scleral lens for keratoconus is designed for your eye specifically. A cone is exactly the shape that stock parameters do not fit.
Corneal mapping. We map your corneal shape in detail, and for complex eyes we use Eaglet Eye profilometry, which measures the whole ocular surface rather than just the central cornea. That matters on a keratoconic eye, because the lens lands out on the sclera and the sclera is not symmetrical.
Diagnostic lenses. We put lenses on the eye and assess the vault over the cone, how the edge lands, and your vision through it. This is also when you find out what your corrected vision could be.
Your lenses are made to those measurements — over a few weeks, not the same day.
Dispensing and training. Filling, inserting, removing and cleaning a scleral lens is a real skill and it is taught here until you can do it without us. Nobody leaves before that.
Refinement. Parameters are often adjusted once or twice before the fit holds all day. On a complex cone that is normal, and it is part of the fitting rather than an extra charge. The full walkthrough is on the scleral lens fitting process.
Living with them
Most wearers settle into a routine that takes a couple of minutes at each end of the day. Insertion and removal become automatic. Wearing time builds up over the first weeks. Lenses are cleaned nightly and replaced periodically rather than monthly.
Two things come up often enough to mention. Fogging — vision that clouds over some hours in — is common, usually fixable, and not something to live with. Midday removal and refilling is sometimes needed at first and often stops being necessary once the fit is refined.
If you already wear sclerals and any of that sounds like your normal, it should not be. A fit that needs constant management is a fit that has not been finished.
What it costs
There is no single price, because a keratoconus scleral fitting is a clinical process rather than a product — mapping, custom design, diagnostic fitting, training, and follow-up with refinements.
Michigan Contact Lens is out-of-network by choice, which means the decision about your eyes is Dr. Kresch’s and yours rather than an insurance plan’s. We provide a detailed superbill you can submit for out-of-network reimbursement, and we accept HSA and FSA funds, CareCredit and in-house payment plans. See what drives the cost and Insurance & Payment Options.
Keratoconus scleral lens fitting in Metro Detroit
Michigan Contact Lens is at 17000 W. 10 Mile Rd., Suite 150, Southfield, MI 48075 — serving Birmingham, Royal Oak, Troy, Farmington Hills, West Bloomfield, Novi, Oak Park, Huntington Woods, Rochester Hills and Detroit. Meet Dr. Kresch.
No referral is needed, and your initial specialty consultation is complimentary — corneal mapping, diagnostic lenses where appropriate, and an honest answer about what your vision could be.
If you have been told nothing more can be done, that is very often a statement about what has been tried rather than about your eyes.
Scleral Lenses and Keratoconus
- How do scleral lenses help keratoconus?
A keratoconic cornea is irregular, and glasses or soft lenses cannot correct an irregular surface — they simply pass the distortion through. A scleral lens vaults completely over the cornea without touching it and rests on the white of the eye, with a reservoir of sterile saline in the gap. Light then enters through the lens's own smooth front surface instead of your irregular cornea. That is why vision can go from unusable in glasses to sharp in a scleral lens: the lens replaces the optical surface rather than trying to correct it.
- Are scleral lenses better than RGP lenses for keratoconus?
Not universally — it depends on the cone. A corneal RGP is smaller and rests on the cornea itself, and for mild to moderate keratoconus with a reasonably central cone it can work very well. As the cone steepens or sits off-centre, a corneal lens starts to decentre, pop out, or press where it should not. A scleral clears the cornea entirely, so it stays stable on shapes that defeat a corneal lens, and it is far more comfortable if your cornea is sensitive or dry. We fit both and recommend from your corneal map.
- Can scleral lenses stop keratoconus getting worse?
No, and any claim otherwise should be treated with suspicion. Scleral lenses restore vision; they do not change the disease. Halting progression is what corneal cross-linking is for, and the two are complementary rather than alternatives — cross-linking stabilises the cornea, and a scleral lens gives you usable vision through the irregular shape that remains. Many patients need both.
- Will scleral lenses help advanced keratoconus?
Often yes, and this is where they matter most. Because the lens vaults over the cornea rather than resting on it, it can clear shapes that no corneal lens will sit on. Many patients told a transplant was their only remaining option see well in a scleral lens. What limits the result is not the steepness of the cone but corneal scarring — if scarring sits in your line of sight, the lens gives a smooth surface but the light still passes through the scar.
- How long does a scleral lens fitting for keratoconus take?
Expect a process rather than an appointment. Corneal mapping and diagnostic lenses happen at the first visit, your lenses are then made to your measurements over a few weeks, and after dispensing there are follow-up visits to refine the fit. Most fits settle within a handful of visits; a complex cone can take more. Refinement is part of the process rather than a sign something went wrong.
- Do scleral lenses hurt with keratoconus?
Most patients find them markedly more comfortable than corneal rigid lenses, and often more comfortable than soft lenses. The reason is mechanical: nothing rests on your cornea, which is the sensitive tissue. The lens lands on the sclera, which has far less sensation. Handling takes practice — the lens is filled with saline before insertion — but comfort is rarely the obstacle people expect.
Ready to see clearly again?
Michigan Contact Lens fits scleral and specialty lenses for keratoconus, irregular corneas, corneal transplants, and severe dry eye.