Am I a candidate for scleral lenses?

Who scleral lenses are usually for

Scleral lenses are mostly a medical lens. In an international survey of scleral lens patients, the reasons for wearing them were corneal irregularity in 87% of patients, eye surface disease in 9%, and an uncomplicated prescription in only 4%.^[1] A separate survey of fitters found the same pattern.^[2]

You may be a candidate if your cornea is irregular. That includes:

• Keratoconus and pellucid marginal degeneration
• Thinning or bulging after LASIK, PRK, or radial keratotomy
• Irregular astigmatism after a corneal transplant
• Scarring from injury or infection

The common thread: glasses can’t correct the distortion, and smaller lenses aren’t giving you clear, comfortable vision.

You may be a candidate if your eye surface is damaged or very dry. A scleral lens keeps the cornea bathed in saline while it’s worn. That can help with severe dry eye, Sjögren’s, graft-versus-host disease, Stevens-Johnson syndrome, neurotrophic keratitis, and exposure problems when the lids don’t close fully. For surface disease, scleral lenses usually come after other treatments. In a survey of fitters, drops, gland treatments, and punctal plugs were generally tried first.^[6] In a case series of eye surface disease, patients had tried an average of 3.2 other treatments before scleral lenses.^[5]

Age is less of a barrier than people assume. In a study of 120 veterans with an average age of 56.7, age wasn’t different between those who kept wearing their lenses and those who stopped.^[4] At the other end, a specialist center reviewed 209 children’s eyes fitted over 21 years. Of those, 70% were still wearing scleral lenses at the time of review, 8% had stopped, and the status of the rest was unknown.^[7]

Who may not suit scleral lenses, or needs extra care

None of these automatically rules you out. They’re things a fitter will weigh with you.

A regular cornea and an ordinary prescription. If soft lenses or corneal rigid lenses work for you, a scleral lens is unlikely to be an upgrade. In a one-year study of 95 wearers, 77% of those with irregular corneas were still wearing their lenses at 12 months, compared with 58% of those with regular corneas.^[3]

Difficulty handling a large lens. Handling is the biggest practical hurdle. In that same study, handling problems accounted for 35% of those who stopped.^[3] In the veterans study, difficulty with insertion and removal was the most common reason for stopping, cited by 53.7% of those who quit, and people with a neurologic condition were more likely to stop.^[4] In a study of 50 people fitted with mini-scleral lenses, 22% of patients had stopped by six months, mainly because of handling.^[11] Poor vision, a tremor, arthritis, or limited hand strength can make it harder, though tools, technique, and a helper can make a real difference. See our guide to wearing scleral lenses with shaky hands.

A cornea that can’t cope with less oxygen. The cornea’s inner cell layer pumps fluid out to keep it clear. If those cells are weak, as can happen after a transplant, a scleral lens may cause the cornea to swell. In a small study of 9 grafted eyes, short-term scleral lens wear caused about three times as much swelling as in healthy eyes.^[9] In a survey covering 72,605 scleral wearers, corneal swelling led 1.2% to stop wearing their lenses over a year.^[8] Your fitter may measure your corneal thickness or cell count before and after a trial.

Glaucoma or pressure concerns. People often ask whether a scleral lens raises eye pressure. A 2026 meta-analysis of 22 studies (830 eyes) found no significant change in eye pressure after lens removal, though the authors still advise selective monitoring in high-risk patients.^[10] Tell your fitter if you have glaucoma or have had glaucoma surgery.

Only one seeing eye. Any contact lens carries some risk of infection. If you depend on one eye, that risk deserves a careful conversation with your doctor before you start.

A routine you can’t keep up. Scleral lenses need daily cleaning, fresh sterile saline, and regular check-ups. If that isn’t realistic right now, say so. There may be a simpler option.

What a fitter assesses

A first scleral lens visit is mostly about measurement and judgment. Expect your fitter to look at:

• Your history and goals. What you’ve tried, what failed and why, and what you need to see: driving at night, reading, screens, work.
• Corneal shape. Mapping the cornea with topography or tomography, and sometimes scanning the shape of the white of the eye too.
• Eye health. The surface of the eye, the lids, the tear film, and any scarring or past surgery.
• Corneal health. Corneal thickness and, especially after a transplant, the health of the inner cell layer.
• Handling. Whether you, or someone helping you, can realistically put the lens in and take it out. Ask whether you can practice before a lens is ordered.
• Your other eye. How it sees, and whether it needs a lens too.

Then comes a trial or a scan-based design, which we cover in what a scleral lens fitting involves.

Questions to ask at your first visit

• Based on my eyes, what are my options, and where do scleral lenses rank among them?
• Is there anything about my eye health that makes scleral lenses riskier for me?
• Can I practice putting a lens in before we order?
• If I can’t manage the handling, what would we try instead?

For a fuller list, see questions to ask a scleral lens fitter.