Scleral lenses may be worth considering when glasses or standard contact lenses cannot provide clear, stable, or comfortable vision because the cornea is irregular or the ocular surface is compromised. They are custom medical devices, not a universal upgrade from ordinary contacts, and the decision should begin with a specialty eye examination.
At Global Vision Rehabilitation Center, led by Dr. Edward Boshnick, the question is not simply whether a scleral lens can be placed on the eye. The goal is to determine what is causing the visual or comfort problem, whether a scleral lens addresses that cause, and which design is appropriate for the individual eye.
The short answer: who should consider scleral lenses?
A scleral lens evaluation may be reasonable if one or more of these situations applies to you:
- Your glasses prescription is current, but vision still looks distorted, doubled, ghosted, or unstable.
- Soft contact lenses do not provide enough clarity or become too dry or uncomfortable to wear.
- Smaller corneal gas-permeable lenses move, dislodge, or irritate the eye.
- You have been diagnosed with keratoconus, corneal ectasia, corneal scarring, or another irregular corneal condition.
- You have persistent visual symptoms after LASIK, RK, corneal transplant surgery, or another corneal procedure.
- Dry eye or ocular surface disease has made ordinary lens wear difficult.
These signs do not prove that scleral lenses are right for you. They identify reasons to seek a more detailed evaluation.
How does a scleral lens work?
A scleral lens is a large-diameter, gas-permeable lens that vaults over the cornea and lands on the white part of the eye. Before insertion, the lens is filled with the preservative-free sterile filling solution recommended by the treating doctor. This creates a fluid reservoir between the back of the lens and the front of the eye.
The lens and fluid reservoir can create a smoother optical surface in front of an irregular cornea. For selected patients with ocular surface disease, the reservoir may also help protect the cornea and reduce friction during wear. These two functions explain why scleral lenses are considered for both visual rehabilitation and certain ocular surface problems.
What conditions may lead to a scleral lens evaluation?
Keratoconus and corneal ectasia
When the cornea becomes irregular, glasses may not fully correct the resulting optical distortion. A scleral lens can help by creating a regular front optical surface. Read more about scleral lenses for keratoconus and scleral lenses for corneal ectasia and irregular cornea.
Dry eye and ocular surface disease
Some patients with significant dry eye or ocular surface disease cannot tolerate standard contact lenses. A fluid-filled scleral lens may be considered as part of a broader management plan. It does not treat every cause of dry eye and does not replace necessary treatment for eyelid disease, inflammation, infection, or systemic disease. Learn about scleral lenses for dry eye and Sjögren’s syndrome and ocular surface disease.
Post-surgical or scarred corneas
LASIK, RK, corneal transplantation, trauma, and other procedures can leave the cornea optically irregular. A scleral lens does not reverse surgery or remove a scar, but it may improve the optical surface in front of the eye. Explore scleral lenses after LASIK and RK and scleral lenses after corneal transplant or scarring.
What benefits are realistic?
Depending on the diagnosis and the response to a diagnostic lens, realistic goals may include clearer vision, less optical distortion, improved lens stability, better wearing comfort, or protection of a fragile ocular surface. Published studies report visual and quality-of-life improvements for many patients with keratoconus, while also documenting limitations such as handling difficulty, fogging, discomfort, and the need for ongoing follow-up.
No website can predict your result. The amount of improvement depends on the health of the cornea, retina, optic nerve, tear film, eyelids, and other parts of the visual system.
What scleral lenses do not do
- They do not cure keratoconus or stop progression.
- They do not reverse LASIK, RK, a corneal transplant, or other surgery.
- They do not treat retinal, optic nerve, or cataract-related vision loss.
- They do not replace treatment for active infection or inflammation.
- They do not guarantee 20/20 vision, all-day comfort, or freedom from glare and halos.
These limitations are important because they help set a useful treatment goal before a custom lens is ordered.
How Dr. Boshnick evaluates the decision
Dr. Boshnick has devoted decades of practice to specialty contact lenses and visual rehabilitation for complex corneal and ocular surface problems. The evaluation may include a detailed history, refraction, ocular surface examination, corneal mapping, assessment with diagnostic lenses, and review of prior surgery or lens records.
The trial lens is especially useful: it allows the doctor to evaluate clearance, landing, comfort, stability, and potential visual improvement on the actual eye. If the case requires more customization, Eye Freedom may consider options such as EyePrintPRO custom-molded scleral lenses or wavefront-guided scleral lenses. Advanced technology is selected for a clinical reason; not every patient needs the most complex design.
Questions to bring to your evaluation
- What is the main reason my current correction is not working?
- Is the goal better acuity, less distortion, improved comfort, ocular surface protection, or a combination?
- What other lens or treatment options should be considered?
- How will we judge whether the diagnostic scleral lens is helping?
- What follow-up, care supplies, and handling skills will I need?
Bring previous lens information, surgical records, and a concise description of when your symptoms are best and worst. This helps connect measurements with daily function.
Frequently asked questions
Are scleral lenses only for severe keratoconus?
No. Keratoconus is a common indication, but scleral lenses may also be considered for other irregular corneas, selected ocular surface diseases, post-surgical vision problems, corneal scarring, and contact lens intolerance.
Can I try a scleral lens before deciding?
A diagnostic lens is commonly evaluated during the fitting process. It can help estimate visual potential and show how the lens interacts with the eye, although a final custom lens may perform differently.
Do scleral lenses replace dry eye treatment?
No. They may be one part of care for selected patients. The underlying causes of dryness, inflammation, eyelid disease, or systemic illness may still require separate management.
How do I find out whether I am a candidate?
Start with the Eye Freedom scleral lenses guide and Scleral Lens FAQ. To ask about a specialty evaluation, use the contact form or call 305-271-8206.
Medical references
- National Eye Institute: Corneal dystrophies and keratoconus
- National Eye Institute: Dry Eye
- CLEAR evidence-based report on scleral lenses
- Systematic review of scleral lens outcomes in keratoconus
This article is for education only and is not a diagnosis or treatment plan. A specialty eye examination is required to determine whether scleral lenses are appropriate for your eyes. New pain, marked redness, light sensitivity, discharge, or sudden vision change warrants prompt professional eye care.
