Why the choice matters
A scleral lens is custom-made for one eye, and getting it right usually takes several visits and more than one lens. In an international survey describing 259 scleral lens patients, fits took an average of 3.8 visits and 2.4 lenses.[5] The practice you pick shapes how smoothly that goes, what it costs you in time and money, and who you call when something goes wrong.
This page is the comparison checklist. For what happens at the fitting itself, see what a scleral lens fitting involves. For questions to ask the fitter during your visit, see questions to ask a scleral lens fitter.
1. Experience, especially with your condition
Experience varies a lot between practitioners. In a 2020 survey of scleral lens fitters, the median fitter had completed 100 fits, but the range ran from 5 to 10,000.[1] A study that followed one new fitter through their first 156 fittings found the number of trial lenses and reorders fell as they gained experience, with a clear drop after the first 60 cases.[2]
Ask how many scleral lens patients they see, and how many with your condition: keratoconus, a corneal transplant, severe dry eye, or eyes after surgery. Wearers often put it this way: there’s a difference between a doctor who can fit sclerals and one who does, every week.
A credential can help you shortlist. The Scleral Lens Education Society awards fellowship (FSLS) to optometrists, ophthalmologists and certain contact lens fitters who have shown their work in scleral lens fitting, and lists fellows publicly.[6] Plenty of skilled fitters don’t hold it, so don’t rule anyone out on that alone. See scleral lens specialist vs a regular eye doctor for what the credentials mean.
2. Equipment for measuring your eye
Practices map the eye in different ways: corneal topography or tomography (a map of the cornea’s shape), anterior segment OCT (a cross-section image that shows the fluid layer under the lens), and scleral profilometry (a scan of the white of the eye where the lens lands). See what is scleral profilometry?
More equipment isn’t automatically better. In a survey of 423 fitters who fit scleral lenses for keratoconus, the median number of lenses ordered was the same whether the fitter used trial lenses, scans, or impressions.[3] Most of those fitters still used trial lenses for most fits, and the advanced tools were more often available in academic and high-volume practices.[4] The useful question is: what will you use for my eye, and who do you refer to if I need something you don’t have?
3. Range of lens designs and approaches
Ask which lens designs and labs they work with, and whether they can offer:
- custom features such as toric or quadrant-specific edges, or notches to clear a raised spot like a pinguecula
- surface coatings, if your lenses fog or smudge (see what is a scleral lens surface coating?)
- lenses designed from a scan or from a mold of the eye (see impression-based, scan-based or PROSE)
- a referral for PROSE treatment if it’s ever needed (see what is PROSE treatment?)
A practice that works with only one design may be fine for straightforward eyes. If yours are complex, a wider toolkit, or a willingness to refer, matters more. Many wearers say the fitter matters more than the brand.
4. Remakes, warranties and follow-up
Needing more than one lens is normal (see how many remakes is normal?). Ask how long the remake or exchange window is, whether it restarts with each lens, which follow-up visits are included, and what happens if the fit isn’t working when the window ends.
5. Fee transparency
Ask for the fitting fee, the lens cost, and what’s excluded, in writing, before you start. If you’re paying without insurance, you can ask for a Good Faith Estimate, and the provider should give it to you in writing within 3 business days of asking.[7] See what is included in a scleral lens fitting fee.
6. Insurance handling
Some practices are in network with medical or vision plans, some bill as out of network, and some don’t bill insurance at all but give you an itemized statement (a superbill) to submit yourself. Ask which applies, whether they handle prior authorization, and whether they’ll write a letter of medical necessity. See out-of-network claims and superbills and prior authorization.
7. Location and travel
Count the trips: fitting visits, the dispensing visit, follow-ups, and an urgent visit now and then. A farther practice can still make sense if it’s clearly more experienced with eyes like yours. See is it worth traveling for a scleral lens fitting?
8. Communication and support
Notice how the office treats your questions. Ask how to reach them between visits, what happens after hours if you can’t get a lens out or your eye becomes painful, and who you’ll see at each appointment.
The checklist
Print this or copy it into your notes, and fill in one column per practice.
| What to check | What a clear answer looks like | Practice A | Practice B |
|---|---|---|---|
| Scleral lens experience | Fits sclerals routinely; can describe how often | ||
| Experience with your condition | Sees patients like you regularly | ||
| Credentials | FSLS, FAAO or similar, or a clear account of training | ||
| Measuring tools | Names what they’ll use for your eye | ||
| Lens designs | More than one approach, or a clear referral path | ||
| Impression-based or PROSE access | Offers it or knows where to refer | ||
| Remake window | Length stated, in writing | ||
| Follow-ups included | Which visits, and for how long | ||
| Replacement lenses | Priced separately and explained | ||
| Written estimate | Itemized, before you commit | ||
| Insurance | In network, out of network, or superbill, stated plainly | ||
| Prior authorization | Who submits it, and when | ||
| Travel | Number of likely trips, and time per trip | ||
| Urgent problems | A phone number and an after-hours plan | ||
| Wait for first visit | Stated honestly |
What wearers say
Many wearers say the biggest lesson was to choose the fitter, not the lens brand. People who struggled through many remakes often describe success after moving to someone who fits complex eyes every week, sometimes after a long drive. Others found an excellent fitter close to home and say travel wasn’t needed. A common regret is not asking about the remake window and fees up front. Wearers also note that a practice’s general reviews rarely say anything about fitting skill.
Finding a practice
For where to look and how to start, see how do I find a good scleral lens specialist? Use the checklist above with any practice you find, and see red flags when choosing a practice for what to avoid.
Common questions
What is the single most important thing to look for?
Regular, recent experience fitting scleral lenses for eyes like yours. Equipment and lens designs help, but in published research the fitter's experience is what consistently reduced the number of lenses needed.
Should I choose the practice with the newest scanning equipment?
Not on that alone. In a large survey of fitters, trial lenses, scans and impressions needed a similar number of lenses for keratoconus. Advanced tools matter more for very irregular eyes, so ask whether the practice has them or refers to someone who does.
Is a credential like FSLS required?
No. Fellowship in the Scleral Lens Education Society shows a fitter has documented scleral lens work, but many experienced fitters don't hold it. Treat it as one useful signal, not a requirement.
How many practices should I compare?
Two or three is usually enough. Call each with the same questions so you can compare answers directly.
Can I trust online reviews?
Use them with care. Wearers often point out that general reviews describe parking, wait times and staff, not fitting skill. Ask the practice directly about experience with your condition.
What if the closest practice isn't very experienced?
Weigh the trips. Some people travel for the fitting and see a local eye doctor for routine care in between. See our page on whether it's worth traveling for a fitting.