How corneal dystrophies affect your eye
Corneal dystrophies are a group of inherited conditions of the cornea, the clear front window of the eye. In most, abnormal material builds up in one layer. They usually affect both eyes and often progress slowly.[8] An international committee classifies them by the layer of the cornea they affect, and it updated that classification in 2024.[1]
Which layer is involved decides the symptoms:
- Surface (epithelial) dystrophies, such as epithelial basement membrane dystrophy (EBMD, also called map-dot-fingerprint dystrophy) and Meesmann dystrophy, affect the surface layer. They can cause painful erosions and an uneven surface that distorts vision.[1]
- Dystrophies just under the surface, such as Reis-Bücklers and Thiel-Behnke, cause both erosions and cloudiness near the front of the cornea.[1]
- Stromal dystrophies, such as lattice and granular, deposit material in the cornea’s thick middle layer. They can cloud vision and also cause erosions.[1]
- Endothelial dystrophies, most commonly Fuchs, damage the inner cell layer that pumps fluid out of the cornea, so the cornea swells.[1]
A 2021 review sums up the problem for lens wearers: dystrophies tend to cause pain from recurrent erosions and blur from irregular astigmatism.[7]
Some changes are very common and harmless. In a 1981 study, map-dot-fingerprint changes were found in 76% of people over 50 and 42% of people of all ages. Recurrent erosion symptoms were rare among them.[2] Having the changes on an exam doesn’t mean you need treatment.
How a scleral lens can help
A scleral lens is a large rigid gas-permeable lens. It rests on the sclera (the white of the eye) and arches over the entire cornea without touching it. Before insertion it is filled with sterile saline.
- It smooths an uneven surface optically. The saline layer fills in surface irregularities, which largely cancels them out. This is the main way a lens improves vision in a dystrophy.
- It protects the surface during the day. The blinking lid slides over the lens instead of a fragile surface. A 2025 review describes scleral lenses being used for the cloudiness and recurrent erosions of the front-layer dystrophies.[8]
It can’t remove deposits or clear cloudiness inside the cornea, and it is taken out at night.
What the research shows, dystrophy by dystrophy
Overall, the evidence is scarce. A 2021 review states this plainly.[7] The 2024 international classification’s management table, which covers every recognized dystrophy, doesn’t mention scleral lenses at all. It lists soft bandage contact lenses for erosions in several dystrophies.[1]
Dystrophies grouped together in larger studies. At one Houston academic center, 17 of 825 eyes fitted with PROSE (a type of custom scleral lens) had a corneal dystrophy. The abstract doesn’t say which ones. In the group of 262 eyes with irregular corneas, which included those 17, vision improved by an average of 0.46 logMAR, and every subgroup but one improved significantly, the dystrophy eyes among them.[3] In a Dutch study of 284 eyes wearing scleral lenses, corneal dystrophy was one of the diagnoses, and every patient in the study was able to continue wearing their lenses at follow-up. Results weren’t reported by diagnosis.[4]
Lattice dystrophy. A 2025 review cites an older series of 530 people referred for scleral lenses in which people with lattice dystrophy were fitted successfully, with better vision and symptom control.[8] We found no recent study focused on lattice.
Reis-Bücklers dystrophy. We found one case report. A patient with advanced disease in both eyes tried a PROSE lens, which improved vision further than a rigid corneal lens, with more comfort. The patient didn’t want to wear lenses and was treated with deep laser treatment instead.[5]
Epithelial basement membrane (map-dot-fingerprint) dystrophy. We found no study of scleral lenses for EBMD itself. A PROSE questionnaire study listed EBMD among a handful of “other” conditions, without separate results.[6] EBMD is a common cause of recurrent corneal erosion; our recurrent corneal erosion page covers why a scleral lens is rarely the first answer there.
Granular dystrophy. The same PROSE study listed granular dystrophy among its “other” conditions, again without separate results.[6] We found nothing else.
Meesmann, Thiel-Behnke, and the other rare dystrophies. We found no reports of scleral lens use.
Fuchs dystrophy. This is where caution matters most. Scleral lenses reduce the oxygen reaching the cornea.[8] A 2019 review lists Fuchs dystrophy and low endothelial cell density among potential contraindications to scleral lens wear.[9] A 2025 review calls them relative or absolute contraindications depending on severity.[8] The standard definitive treatment for Fuchs is endothelial keratoplasty, a partial-thickness transplant of the inner layer.[1]
Other options, compared
The 2024 international classification lists the usual treatments for each dystrophy.[1]
| Option | What it does | Typically suited to |
|---|---|---|
| Lubricants, salty (hyperosmotic) drops, nighttime ointment | Keep the surface moist and help it stick down | Erosions in EBMD and other surface dystrophies |
| Soft bandage contact lens | Covers the surface while it heals | Acute erosions; Meesmann and some others |
| Superficial keratectomy, stromal puncture, diamond burr polishing | Remove loose tissue or help the surface reattach | Erosions or surface irregularity that keep coming back |
| Phototherapeutic keratectomy (laser) | Removes cloudy or irregular tissue near the front | Reis-Bücklers, Thiel-Behnke, lattice, EBMD in the line of sight |
| Scleral lenses | Smooth the surface optically and protect it by day | Irregular surface blur when other steps haven’t worked |
| Lamellar or full-thickness transplant | Replaces affected tissue | Deeper cloudiness, as in lattice dystrophy |
| Endothelial keratoplasty | Replaces the inner pump layer | Fuchs dystrophy with swelling |
Questions to ask a scleral lens fitter
- Which dystrophy do I have, and which layer of the cornea does it affect?
- How much of my blur comes from the surface, and how much from cloudiness?
- Have you fitted scleral lenses for my dystrophy before?
- Is my endothelial cell count high enough for a scleral lens?
- How will I protect my eye from erosions overnight?
- Would laser treatment be a better first step for me?
Common questions
Can a scleral lens stop my dystrophy from getting worse?
No. Dystrophies are inherited, and a lens doesn't change the material building up in the cornea. A lens can improve vision while you wear it if the surface is uneven, and it keeps the surface moist during the day.
I have map-dot-fingerprint (EBMD) dystrophy and recurrent erosions. Should I try a scleral lens?
Probably not first. Standard care for erosions starts with lubricants and nighttime ointment, then bandage lenses and in-office procedures. A scleral lens is more likely to be considered if the surface stays uneven and blurs your vision. See our recurrent corneal erosion page for the details.
I have Fuchs dystrophy. Can I wear scleral lenses?
Ask your cornea specialist before a fitting. Scleral lenses reduce the oxygen reaching the cornea, and reviews list Fuchs dystrophy and low endothelial cell counts as potential contraindications or reasons for caution. A lens also doesn't treat the swelling Fuchs causes.
Will a scleral lens help if my cornea is cloudy?
Only partly, if at all. The lens corrects an uneven surface. Cloudiness deep in the cornea scatters light no matter what is in front of it. A trial lens can show how much of your blur comes from each.
I had a transplant for my dystrophy. Can I wear a scleral lens now?
Many people wear scleral lenses after a transplant. Some dystrophies, including Reis-Bücklers and Thiel-Behnke, often come back in the graft. Your fitter and surgeon will want to check the graft and its inner cell layer first.
Could wearing a scleral lens have caused my dystrophy?
Corneal dystrophies are inherited, so a lens doesn't cause them. If you notice new changes in your eye while wearing lenses, tell your fitter and eye doctor so they can look for the cause.
Will a scleral lens fix ghosting from map-dot-fingerprint (EBMD) dystrophy?
It may. EBMD can leave the surface uneven, which causes ghosting that glasses can't correct, and a scleral lens can smooth that out optically. A trial lens in the office is a practical way to see how much your vision improves.
Why does my lens fog more than other wearers describe?
Corneal dystrophies and scarring can make the saline under the lens cloud faster for some people. Changes to the fit, the fill, or your cleaning routine sometimes help, but change one thing at a time with your fitter's agreement. Tell your fitter how soon the fog starts and whether one eye is worse.
I have a dystrophy and need cataract surgery. What should I plan for?
Tell your surgeon about your dystrophy and your scleral lenses well before the operation. Ask how long you will need to stay out of your lenses and when you can be refitted, since your lens prescription will change afterward. Your surgeon and fitter should plan the timing together.