Conditions
Conditions scleral lenses are used for
Each guide explains how the condition affects vision, how a scleral lens helps, where it doesn't, and what the published research says.
Irregular corneal shape
The cornea is too steep, thin, or uneven for glasses or soft lenses to give clear vision.
Scleral lenses after corneal cross-linking
Cross-linking aims to stop the cornea getting worse. It rarely gives back clear vision on its own, so many people go on to wear a scleral lens. Here is what the research says about doing both.
Scleral lenses for corneal dystrophies
Corneal dystrophies are a family of inherited conditions, and the scleral lens evidence differs for each. For most, it is very thin or missing.
Scleral lenses for corneal scarring and irregular astigmatism
A scar can blur vision in two ways: by warping the cornea's surface and by clouding the tissue itself. A scleral lens can help with the first, not the second.
Scleral lenses for very high prescriptions
Scleral lenses can correct very strong prescriptions, including after the eye's natural lens is removed. But this is a small part of scleral lens practice, and most people have simpler options first.
Scleral lenses for irregular astigmatism
Irregular astigmatism is the common thread behind most scleral lens fittings. Here is what it is, why glasses struggle with it, and what the research shows.
Scleral lenses for keratoconus
Why a lens that vaults over the cornea can give clear vision when glasses can't, what the research shows, and where scleral lenses fall short.
Scleral lenses for children with keratoconus
Keratoconus found in childhood tends to be further along and to move faster. Here is how scleral lenses and cross-linking fit together, and what to expect as a family.
Scleral lenses for keratoglobus
Keratoglobus thins the whole cornea, not just one spot. A scleral lens can sharpen vision without touching it, but the fragile eye changes how the lens is fitted, handled, and followed.
Scleral lenses for pellucid marginal degeneration
Why thinning near the bottom edge of the cornea is hard to correct with glasses or small lenses, what the research shows for scleral lenses, and where they fall short.
Scleral lenses for Salzmann's nodular degeneration
Why a lens that vaults the cornea can smooth out the bumps Salzmann's nodules create, how little research there is, and when surgery may be the better route.
Scleral lenses for Terrien's marginal degeneration
Terrien's thins the edge of the cornea slowly, and the astigmatism it causes can outgrow glasses. Scleral lenses can help, though the published evidence is a handful of eyes.
After eye surgery
Vision problems that follow a transplant, LASIK, RK, or other corneal surgery.
Scleral lenses after PRK
Most people see well after PRK. For the few who don't, here is what a scleral lens can and can't fix, and how little research looks at PRK on its own.
Scleral lenses after pterygium surgery
A scleral lens lands on the same strip of eye where pterygium surgery is done. Here is what is known, what isn't, and what to ask before a fitting.
Scleral lenses after a corneal transplant
Why a successful graft can still leave vision blurred, how a scleral lens can fix that, and why the health of the graft's inner cell layer shapes every fitting decision.
Scleral lenses after an eye injury
After a cut or penetrating injury is repaired, the cornea often heals scarred and uneven. A scleral lens can give back much of the sharpness that glasses can't.
Scleral lenses for children with aphakia
After childhood cataract surgery, a child's eye often has no focusing lens, and clear vision is needed quickly for the eye to develop. Scleral lenses are one option among several. Here is where they fit and what the evidence shows.
Scleral lenses for post-LASIK ectasia
Why vision can blur again years after laser eye surgery, how a lens that vaults the cornea can bring it back, and where scleral lenses fall short.
Scleral lenses after radial keratotomy (RK)
Why eyes treated with RK decades ago can see differently morning and evening, how a lens that vaults the cornea can steady vision, and what to watch for.
Severe ocular surface disease
The front of the eye needs protection and constant moisture to heal and stay comfortable.
Scleral lenses for aniridia
Why a lens that keeps the cornea bathed can help the fragile surface of an aniridic eye, how thin the evidence is, and what a scleral lens can't do.
Scleral lenses for atopic keratoconjunctivitis
AKC is a long-lasting allergic inflammation of the eye surface that can scar the cornea. Once the inflammation is under control, a scleral lens can shield the cornea and sharpen vision. Here is what the limited research shows.
Scleral lenses after a chemical eye injury
A scleral lens is not emergency treatment. Later, once the eye has settled, it can protect a damaged surface and help you see. Here is how it fits into recovery, what the limited evidence shows, and its limits.
Scleral lenses for exposure keratopathy
When the eyelids can't close fully, the cornea dries out and breaks down. A fluid-filled scleral lens can keep it covered during the day. Here is how it works, what the research shows, and its limits.
Scleral lenses for facial nerve palsy
When the facial nerve stops working, the eyelids may not close or blink properly. Most Bell's palsy recovers, but when it doesn't, or the palsy follows surgery, a scleral lens can protect the eye by day. Here is what the evidence shows.
Scleral lenses after herpes keratitis
Herpes can leave the cornea scarred, uneven, or numb. A scleral lens can help with all three, but herpes also comes back, and a numb eye may not warn you of trouble.
Scleral lenses for limbal stem cell deficiency
When the stem cells that renew the cornea's surface are damaged, the cornea can't keep itself clear. A scleral lens can't replace those cells, but it can help vision and protect the surface. Here is what the evidence shows, including a reason for caution.
Scleral lenses for ocular mucous membrane pemphigoid
Ocular pemphigoid scars the surface of the eye and is treated with medicine that calms the immune system. A scleral lens can't do that job, but it can protect the cornea and help you see. Here is what the evidence shows.
Scleral lenses for neuropathic corneal pain
For some people, a scleral lens brings quick relief. For others, especially when pain has become centralized, it can't be tolerated. The research is case reports and expert experience.
Scleral lenses for neurotrophic keratitis
When the cornea loses its feeling, its surface can break down and fail to heal. Here is how a fluid-filled scleral lens can protect it, what the research shows, and why infection needs watching.
Scleral lenses for ocular graft-versus-host disease
After a stem-cell or bone-marrow transplant, the eyes are often caught up in chronic GVHD. Here is how a fluid-filled scleral lens can help, what the research shows, and its limits.
Scleral lenses for persistent epithelial defects
A wound on the surface of the cornea that won't close is a warning sign that needs a specialist. Here is how a fluid-filled scleral lens can help it heal, what the studies show, and why infection risk shapes how it's used.
Scleral lenses for recurrent corneal erosion
Why scleral lenses are rarely the first answer for erosions that wake you up in pain, when they might help, and what usually comes first.
Scleral lenses for severe dry eye
Why a lens that holds a pool of saline over the cornea can help when drops, plugs, and medicines haven't, what the research shows, and where scleral lenses fall short.
Scleral lenses for Sjögren's syndrome
Sjögren's is an autoimmune disease that often shows up first in the eyes. Here's where scleral lenses fit in the eye care it needs, what the research shows, and where they fall short.
Scleral lenses for Stevens-Johnson syndrome and TEN
Years after the acute illness, many survivors of Stevens-Johnson syndrome and TEN live with dry, scarred, light-sensitive eyes. Here is how a fluid-filled scleral lens can help, and where it can't.
Scleral lenses for thyroid eye disease
Why a lens that keeps a pool of saline over the cornea can help when bulging eyes and pulled-back lids leave the surface exposed, and what it can't do.
Scleral lenses for vernal keratoconjunctivitis
VKC is a severe allergic eye disease of children and young people. Scleral lenses don't treat it, but they can restore vision when VKC has left keratoconus or scarring behind. Here is what the small body of research shows.