Why there’s no single answer
Every scleral lens does the same job: it vaults over the cornea, holds a layer of saline against it, and rests on the white of the eye. Lenses from established labs are made from similar families of rigid gas permeable materials. See what are scleral lenses made of?
Within a brand, a fitter can change many things. So two people wearing the same brand can have very different lenses, and a lens that fails can often be fixed by changing the design rather than the label.
What actually differs between designs
| Feature | Why it matters | What to ask |
|---|---|---|
| Landing zone options | Spherical, toric, quadrant-specific or fully custom shapes decide how evenly the lens rests | “Can this design be shaped differently in different directions?” |
| Size range | Some designs come in a narrower range of diameters | “What sizes are available, and which suits my eye?” |
| Vault control | How finely the height over the cornea can be adjusted | “Can we change the vault without changing everything else?” |
| Optics | Toric fronts, multifocal options, or correction for higher-order aberrations | “Can this design correct what’s limiting my vision?” |
| Materials and coatings | Oxygen permeability and surface treatment options | “Which materials and coatings does this lab offer?” |
| How it’s designed | Trial-lens sets, scans, or impressions | “Is it fitted from trial lenses, a scan, or a mold?” |
Those options are real, but most lenses don’t use the most advanced ones. In an international survey of fitters, 64% of lenses had simple spherical landing zones, 26% toric, 7% quadrant-specific and 3% custom, and 70% had spherical optics.[1] In other words, many eyes are fitted well with straightforward designs, and the advanced features are there for the eyes that need them.
For how designs are worked out, see impression-based, scan-based, PROSE or standard. For landing zones, see what is a toric landing zone?
Names you’ll hear
Wearers mention many designs by name, for example Zenlens, OneFit, Europa, the BostonSight SCLERAL, AmplEye, and impression-based EyePrintPRO, along with the PROSE treatment program. That list isn’t complete, and it isn’t a ranking. Each has wearers who swear by it and wearers it didn’t suit.
What wearers say
The strongest theme is “shop for the fitter, not the lens.” Wearers repeatedly describe switching from one brand to another and finding the change made a big difference, and just as often describe the reverse. When they dig into why, the answer usually comes back to the fit: a fitter who knew a design well, adjusted it patiently, and kept going until it was comfortable.
Some wearers also point out that switching brands can mean switching labs, which may restart a fitting fee or complicate a warranty. Others say that asking a fitter which design they’d choose for their own eyes, and why, was a good way to judge their reasoning.
When it makes sense to ask about another design
- Your fitter has made several changes and says the current design can’t go further.
- You need a feature your current design doesn’t offer, such as a shaped landing zone, a larger size, or aberration-correcting optics.
- You have something unusual on the white of the eye that needs clearing or matching.
If your fitter doesn’t work with the design that might help, ask for a referral. See finding a scleral lens specialist and questions to ask a scleral lens fitter.
What to ask your fitter
- “Which designs do you work with most, and why that one for me?”
- “What could another design do that this one can’t?”
- “If we switch, what happens to my fees and remake window?”
- “Can I have a copy of my lens brand and parameters?”
When it’s not normal
Whatever the brand, a lens shouldn’t cause these.
Common questions
Should I know which brand of scleral lens I wear?
Yes, it's worth knowing, along with your lens parameters. If you move, need a replacement while traveling, or want a second opinion, the next fitter can start from your current design. Ask for it in your records.
Can I ask my fitter for a specific brand I've read about?
You can ask, but go in with questions rather than a demand. Ask what that design could do for your eye that your current one can't. Fitters usually work best with the designs they know, and some will refer you on if another design is a better match.
Are lenses from a specialty center better than commercial brands?
Not automatically. Some wearers succeeded at a specialty center after other lenses failed; others found a commercial design fitted by an experienced local fitter worked as well or better. The fitter's experience with eyes like yours is the common thread.
