Weighing a real commitment
Scleral lenses ask a lot: several fitting visits, a real cost, a morning routine that takes practice, and cleaning every night. It’s sensible to ask whether the payoff justifies that. The research gives a fairly clear answer for groups of people, and a less certain one for any individual.
What people gain
Vision
For irregular corneas, the vision gains are often large. In a US study of 157 eyes with keratoconus, average best-corrected vision improved from 0.50 logMAR in glasses (about 20/63) to 0.08 logMAR in scleral lenses (about 20/24). That study included only eyes that had worn scleral lenses successfully for at least a year.[5]
Daily life
Vision on a chart doesn’t tell you whether driving, reading, or working got easier. Quality-of-life questionnaires try to measure that, and the results are consistently positive.
- Mixed conditions, US. In a prospective study of 101 people with corneal ectasia, irregular astigmatism, or ocular surface disease who had failed conventional treatments, the average NEI VFQ-25 score (a 100-point measure of how vision affects daily life) rose from 57.0 to 77.8 at six months.[1]
- Keratoconus, France. In 24 people (41 eyes), the same questionnaire rose by 19.5 points on average after three months of wear.[2]
- Keratoconus, Belgium. In 50 people fitted with mini-scleral lenses, those still wearing them at six months scored significantly better on both visual functioning and social and emotional wellbeing.[3]
- Five years on. In a review of 121 people treated with PROSE scleral devices, scores rose 23 points at six months and showed no significant decline at five years among those still wearing them.[4]
The full picture, including how to read these scores, is in scleral lenses and quality of life.
Sometimes, avoiding surgery
At one Belgian clinic, 40 of 51 eyes with severe keratoconus that would otherwise have been referred for a corneal transplant were still wearing scleral lenses after about two and a half years on average.[6]
What it costs you
People do stop
This is the honest counterweight.
- In a year-long study of 95 new wearers, 27% stopped. The most common reasons among those who stopped were handling (35%) and discomfort (19%). None stopped because of an adverse event.[7]
- In a study of 120 veterans with an average age of 56.7, 34.2% stopped, a median of 5.2 months after fitting. Difficulty with insertion and removal was the most common reason, given by 53.7% of those who stopped.[8]
- In the Belgian mini-scleral study, 22% had stopped by six months, mostly because of handling.[3]
The daily routine
In a survey of people with keratoconus, 45% of scleral wearers said they spent 6 to 10 minutes a day handling their lenses, similar to corneal rigid lens wearers (48%). But more scleral wearers reported handling difficulty, and more reported halos.[9] In the year-long study, the number of attempts needed to put lenses in and take them out dropped significantly over the year among people who kept going.[7]
Money
Cost is real and varies widely. See can I afford scleral lenses? and how much scleral lenses cost.
Ongoing problems for some
In the US keratoconus study, broken lenses (26.1% of eyes), deposits (8.9%), and reservoir fogging (7.0%) were among the lens problems recorded over follow-up.[5] The most common responses were refitting the lens and retraining the wearer.[5] Note that this study only included eyes that had worn scleral lenses successfully for at least a year.
Who tends to find it worth it
The research points to a pattern:
- Irregular corneas do better. In the year-long study, 77% of people with irregular corneas completed the year, compared with 58% of people with regular corneas.[7]
- The worse your current vision or comfort, the bigger the gain. Most of the large improvements come from people whose previous correction wasn’t working.
- If your current lenses work, the gain may be small. In a randomized trial of 30 people already wearing corneal rigid lenses successfully, scleral lenses were more comfortable on average, but vision and quality-of-life scores were no different, and preferences were split.[10]
Many long-term wearers describe the routine as a hassle that becomes second nature, and the vision or comfort as something they wouldn’t give up. Others decide it isn’t for them, and that’s a legitimate outcome too.
Questions to help you decide
Ask yourself:
- What can’t I do now because of my vision or eye pain? Driving at night, reading, working, being outdoors?
- How much would that change be worth to me, in time and money?
- Can I set aside a few weeks to learn the routine?
Ask your fitter:
- How much better do you realistically expect my vision or comfort to be?
- What are my other options, and how do they compare for my eyes?
- What does the fitting fee include, and what if I stop?
- What usually makes people with my condition give up, and how do you help with that?
If you try them and they don’t work out, see what if scleral lenses don’t work for me?. For the broader evidence, see scleral lens outcomes research.
Common questions
How much time do scleral lenses take each day?
It varies, and it's slowest at the start. In a survey of people with keratoconus, 45% of scleral wearers said they spent 6 to 10 minutes a day handling their lenses, similar to corneal rigid lens wearers (48%). Expect much longer in the first weeks, plus time for cleaning and any midday refill.
Do the benefits last?
In a five-year review of people wearing PROSE scleral devices, quality-of-life scores rose at six months and hadn't significantly declined at five years among those still wearing them. That study came from one specialist center, and people who stopped weren't counted in the continuing group.
Who is most likely to find them worth it?
In the studies, people with irregular corneas such as keratoconus were more likely to keep wearing them than people with regular corneas, and people whose previous correction wasn't working tended to gain the most. People who already see and feel well in other lenses may gain little.
Can I try them before committing?
Many practices put a trial lens on your eye at the first fitting visit so you can see the difference. Ask what it costs to start, what the fitting fee covers, and whether there's any refund or credit if you stop.
Is it normal to feel like quitting in the first weeks?
Many new wearers describe days when they want to give up, especially over insertion. The year-long study found handling improved significantly among people who kept going. If you're close to quitting, tell your fitter first: a tool, technique, or lens change may fix the specific problem.