Scleral Lenses for Corneal Irregularities
What Are Scleral Lenses and Corneal Irregularities?
A healthy cornea has a smooth, dome-shaped surface that helps focus light onto your retina. An irregular cornea has an uneven or distorted shape that scatters light instead of focusing it properly. This creates blurred, distorted vision that glasses cannot fully correct.
Corneal irregularities can range from mild to severe and may affect one or both eyes. Some people are born with these conditions, while others develop them over time from disease or injury.
Standard contact lenses sit directly on the cornea, but scleral lenses are much larger. They vault over the entire corneal surface without touching it and rest on the sclera, the white part of your eye. The space between the lens and your cornea fills with a special saline solution that creates a fluid reservoir.
This design allows the lens to create a smooth optical surface even when your cornea is irregular. The fluid reservoir can improve comfort and protect the corneal surface in certain conditions, and it also keeps your eye moist throughout the day, making these lenses especially comfortable for people with dry eyes.
Several eye conditions can lead to an irregular corneal shape. We commonly fit scleral lenses for patients with these diagnoses:
- Keratoconus, a condition where the cornea thins and bulges into a cone shape
- Corneal scarring from injury, infection, or previous surgery
- Pellucid marginal degeneration, which causes thinning in the lower cornea
- Severe dry eye disease that makes other lenses uncomfortable
- Complications after LASIK or other refractive surgeries
Regular soft contact lenses drape over your cornea and take on its shape. If your cornea is irregular, the lens becomes irregular too and cannot provide clear vision. These lenses may also move excessively, fall out easily, or feel uncomfortable.
Standard rigid gas permeable lenses can provide better vision on irregular corneas, but they rest directly on the highest points of corneal irregularity. In some cases, poorly fitted lenses may cause discomfort, redness, or corneal changes over time.
Signs You Might Benefit from Scleral Lenses
If you notice persistent blurriness, distortion, or ghosting of images even with updated glasses, you may have a corneal irregularity. Many patients describe seeing halos around lights, multiple overlapping images, or fluctuating vision throughout the day.
These symptoms happen because glasses can only correct regular focusing errors. When your corneal surface is uneven, glasses cannot compensate for the distorted light path entering your eye.
Severe dry eye symptoms that do not respond to artificial tears or prescription drops may improve with scleral lenses. The fluid reservoir beneath the lens keeps your cornea bathed in moisture all day long.
- Burning or stinging sensations that worsen as the day goes on
- Feeling like something is in your eye constantly
- Light sensitivity that makes it hard to be outdoors or use screens
- Excessive tearing as your eye tries to compensate for dryness
People with corneal irregularities often struggle with traditional contact lenses. You may find that lenses feel uncomfortable from the moment you put them in, or they pop out throughout the day without warning.
Some patients can only wear their regular lenses for an hour or two before experiencing pain or redness. Others achieve decent comfort but cannot see clearly enough to drive or read, no matter how many times we adjust the prescription.
While most corneal irregularities develop slowly, certain warning signs need urgent evaluation. These symptoms are not signs that scleral lenses will help, but rather signals that you need immediate care to protect your vision.
Contact our office right away if you experience sudden vision loss, severe eye pain, intense light sensitivity with tearing, or see flashes of light or new floaters. These symptoms could signal complications that need immediate treatment to preserve your vision.
How We Diagnose and Measure Your Eyes for Scleral Lenses
Your first visit includes a comprehensive eye exam to evaluate your overall eye health and vision needs. We review your medical history, current medications, and any previous eye surgeries or injuries. Understanding your daily visual demands helps us determine whether scleral lenses are the right choice for you.
We also assess the front surface of your eyes using a microscope called a slit lamp. This lets us see any corneal scarring, thinning, or other abnormalities that might affect lens fitting.
Corneal topography creates a detailed color-coded map of your corneal shape, showing even tiny irregularities. This test is painless and takes only a few minutes per eye. You simply rest your chin and forehead on a support while looking at a target. These images help us detect conditions such as keratoconus and guide the custom design of your lenses.
- Topography measures thousands of points across your cornea to create a 3D map
- Optical coherence tomography may be used to image cross-sections of your cornea
- Corneal thickness measurements help us evaluate disease progression
- Tear film testing assesses your baseline eye moisture levels
- Additional tests may be needed depending on your diagnosis, such as evaluation of the inner corneal layer in patients at risk for swelling
Fitting scleral lenses requires precision and expertise. We use your corneal maps along with measurements of your eye's overall shape to select initial trial lenses. Every eye is unique, so we customize the lens design to match your specific anatomy.
The fitting process considers multiple factors including the height of the lens vault, which is how much the lens arches over your cornea without touching it, the landing zone, which is where the lens rests on the white part of your eye, and the edge design that helps maintain a comfortable fit. We may take additional measurements while you wear trial lenses to fine-tune the design.
During your trial fitting appointment, you will wear diagnostic lenses so we can evaluate the fit. We use special dyes and blue light to see how the lens rests on your eye and check for areas of excessive pressure or inadequate clearance.
Most patients need several trial lenses before we achieve the optimal fit. This is normal and expected. We assess your comfort, vision quality, and how the lens moves with blinking. Once we confirm the best design, we order your custom lenses from the laboratory.
Treatment Options for Corneal Irregularities
For many corneal irregularities, scleral lenses are a common option when glasses, soft lenses, or corneal rigid gas permeable lenses do not provide adequate vision or comfort. We often recommend them for keratoconus, post-surgical irregularities, and severe dry eye. These lenses can improve your vision and, in certain ocular surface conditions such as exposure disease, help protect the corneal surface.
- Progressive keratoconus that glasses cannot adequately correct
- Corneal irregularities after complications from refractive surgery
- Severe dry eye or exposure keratopathy requiring constant corneal surface protection
- Conditions where smaller rigid lenses have failed or caused discomfort
Depending on your specific condition, other treatments may be appropriate. For early keratoconus, corneal cross-linking can strengthen the cornea and slow disease progression. Some patients benefit from combining cross-linking to stabilize the cornea with scleral lenses for vision correction.
Before or alongside scleral lenses, other optical options may be tried, including corneal rigid gas permeable lenses, hybrid lenses that combine a rigid center with a soft edge, custom soft lenses designed for irregular corneas, or piggyback systems where a soft lens cushions a rigid lens. In advanced cases where lenses cannot provide adequate vision, corneal transplant surgery may be considered. Surgical options like intracorneal ring segments can sometimes improve corneal shape. We discuss all appropriate alternatives during your consultation to help you make an informed decision.
The front surface of a scleral lens is designed to create a smooth optical surface that is precisely curved to focus light correctly. When you wear the lens, it creates a new refracting surface for your eye. The fluid layer behind the lens fills in the irregularities of your cornea without changing its actual shape.
Light entering your eye now passes through this smooth lens surface instead of your uneven cornea. This eliminates much of the scattering and distortion that caused your blurry vision. Many patients achieve substantial improvement in vision quality, though final results depend on the underlying corneal health and other eye conditions such as cataract or retinal disease.
Many patients who are good candidates for scleral lenses achieve significant vision improvement and successful long-term wear. High satisfaction has been reported in appropriate candidates who are properly fitted. Initial adaptation typically takes one to two weeks, with comfort and handling skills improving steadily during that time.
Vision stabilizes as you adapt to the lenses and as we make any needed adjustments. Some complex cases require more follow-up visits to achieve the ideal fit. Patience during the fitting process leads to the best long-term outcomes.
Caring for Your Scleral Lenses
Proper lens care prevents infections and keeps your lenses comfortable. Wash and dry your hands thoroughly before handling lenses. Use only the cleaning and disinfection system we prescribe for you, such as a rigid gas permeable multipurpose solution or a hydrogen peroxide system. Do not mix systems unless we instruct you to do so.
Each night, clean your lenses immediately after removal using the cleaner we recommend. Place the lens in your palm, apply several drops of cleaner, and gently rub both surfaces with your finger for the time specified in your care instructions.
- Rinse the lens thoroughly with the rinsing solution we prescribe, never tap water
- Place the lens in fresh disinfecting solution in your lens case
- Allow the lens to soak for at least four to six hours or overnight
- Never reuse solution or top off partially used solution in your case
- Do not rinse your lens case with tap water
- Air-dry your lens case upside down on a clean tissue
- Replace your lens case every one to three months to prevent contamination
- Never reuse single-use saline vials
We teach you the insertion and removal techniques during your training appointments. To insert, fill the lens bowl completely with sterile preservative-free saline while holding it steady with a small plunger. Lean over a mirror on a table, hold your eyelids open wide, and gently place the lens on your eye.
For removal, look straight ahead and hold your upper and lower lids against the lens edges. Use a small removal plunger on the lower part of the lens and gently rock it to break the seal, then lift it straight off. Proper technique becomes easier with practice, and most patients master it within the first week.
Start by wearing your new lenses for just a few hours on the first day, then gradually increase wearing time by one to two hours daily. Most patients build up to full-day wear within the first week or two. Once adapted, you can typically wear scleral lenses for 12 to 16 hours per day.
Always remove your lenses before sleeping unless our eye doctor has specifically approved overnight wear for your situation. Extended wear, including sleeping in lenses, greatly increases your risk of serious eye infections and corneal swelling from reduced oxygen. If overnight wear is medically necessary, we will provide explicit written instructions and schedule close follow-up visits to monitor your eye health.
Taking breaks from lens wear on weekends or days off can help maintain eye health, though many patients wear their lenses every day without problems.
Store your lenses in their proper cases with fresh disinfecting solution whenever they are not on your eyes. Keep your lenses away from extreme temperatures and never let them dry out. If a lens does dry out, do not wear it until it has been fully rehydrated, cleaned, and disinfected using your prescribed care system. Contact us if you are unsure whether the lens is safe to use or if it looks warped or cracked.
- Scleral lenses typically last one to two years with proper care
- Annual replacement ensures optimal vision and reduces complication risk
- Order replacement lenses before your current pair expires
- Keep your previous pair as a backup if the prescription has not changed
Always use preservative-free sterile saline to fill your lenses before insertion. Preserved solutions can damage your cornea when trapped under the lens all day. We may recommend specific brands that work best with your lenses.
Never use tap water, regular contact lens solution, or any other liquid to fill your lenses. These can introduce bacteria, cause serious infections, or irritate your eyes. Single-use vials of saline are safest because they eliminate contamination risk from multi-use bottles.
Life with Scleral Lenses: Follow-Up Care and Monitoring
We schedule your first follow-up visit within one to two weeks after you receive your custom lenses. At this appointment, we evaluate how the lenses fit after settling on your eyes and assess your comfort and vision. We check for areas where the lens may put pressure on the cornea or the edges may need adjustment.
Additional follow-up visits are scheduled as needed during your first few months of wear. Once your fit is stable and you are comfortable, we typically recommend at least annual comprehensive exams, and more often for complex corneas, corneal transplants, severe dry eye, or ongoing fogging or redness. These regular checkups help us monitor your eye health and ensure your lenses continue to fit properly.
Contact us if you notice decreasing vision quality, reduced wearing time before discomfort, persistent redness even after removing lenses, or frequent lens fogging during wear. These symptoms may indicate that your lenses need adjusting or replacing.
- Cloudy or scratched lenses that cleaning does not resolve
- Changes in lens comfort or increased awareness of the lens on your eye
- Protein or lipid deposits that build up despite proper cleaning
- Progression of your underlying condition requiring a new lens design
Most people tolerate scleral lenses very well, but occasional issues can arise. Midday fogging happens when debris accumulates in the fluid reservoir and usually improves by removing, cleaning, and reinserting your lenses.
If you notice a bubble under the lens, remove the lens, refill it completely with preservative-free sterile saline, and reinsert. Persistent bubbles or any pain warrant a same-day call to our office, as bubbles can sometimes cause dry spots on the cornea.
If you develop redness, pain, discharge, or sudden vision changes while wearing your lenses, remove them immediately and contact our office. These symptoms could indicate an infection or other serious problem requiring prompt treatment. Never try to push through discomfort by continuing to wear lenses that hurt.
While scleral lenses are safe for most patients, they do carry some risks and are not right for everyone. Understanding these helps you make an informed decision and recognize problems early.
- Eye infections, including serious infections of the cornea, can occur if lenses are not cleaned properly or if you wear them when you should not. Good hygiene and following care instructions reduce this risk significantly
- Corneal swelling from reduced oxygen can happen, especially in patients with inner corneal layer disease or if lenses are worn too long or overnight without approval
- Tight lens syndrome, suction-related redness, or blood vessel growth can occur with poorly fitting lenses
- Fogging and deposit formation may develop over time and can require lens replacement or treatment of underlying surface inflammation
- Handling difficulties or inability to maintain sterile technique may make scleral lenses unsafe for some individuals
- Active eye infections or inflammation require postponing lens wear and seeking prompt care
- Certain conditions such as very low corneal cell counts, uncontrolled eyelid inflammation, or significant conjunctival abnormalities may make you a poor candidate
Seek immediate care if you experience severe eye pain that does not resolve after lens removal, sudden significant vision loss, intense light sensitivity with severe tearing, or discharge that is yellow or green. A lens that becomes chipped, cracked, or broken should not be worn.
Call us right away for emergency appointments when you have concerning symptoms, and visit an emergency room if you cannot reach us and symptoms are severe. Early treatment of infections and other complications protects your vision and prevents serious damage.
Frequently Asked Questions
Most patients adapt to the feeling of wearing scleral lenses within one to two weeks, though some adjust even faster. Insertion and removal skills typically improve quickly with daily practice, and most people feel confident handling their lenses within the first week. Your vision often stabilizes during the first month as we fine-tune the fit.
Coverage varies widely depending on your specific insurance plan and medical diagnosis. Many medical insurance plans provide partial coverage when scleral lenses are medically necessary for conditions like keratoconus or corneal injury. Vision insurance may offer some benefits, though they typically do not cover the full cost. Our staff can help verify your benefits and provide documentation for insurance claims.
We generally recommend removing scleral lenses before sleep to allow your corneas to receive oxygen directly from the air. Sleeping in any contact lenses, including scleral lenses, greatly increases your risk of serious eye infections and corneal swelling. Overnight wear may be approved in specific medical situations where continuous corneal protection is necessary, but this decision is made on a case-by-case basis with explicit written instructions and defined follow-up schedules. Sleeping in lenses without medical justification and close monitoring increases your risk of complications.
Contact our office as soon as possible if you lose or damage a lens so we can order a replacement. If your prescription has not changed and we fitted you within the past year or two, we can typically reorder your lens using your existing specifications. Keep your backup pair available if you have one, and avoid going extended periods without lens wear if possible to maintain your adaptation.
Yes, scleral lenses are safe for long-term wear when properly fitted and cared for. Many patients wear them successfully for decades with regular follow-up care and annual lens replacement. These lenses can protect the ocular surface in certain conditions such as exposure disease and may improve comfort and vision. However, they do not stop the progression of diseases like keratoconus. Progressive keratoconus is treated with stabilization options such as corneal cross-linking when appropriate. Ongoing monitoring ensures any issues are caught and addressed early.
Getting Help for Scleral Lenses for Corneal Irregularities
If you struggle with blurry vision from corneal irregularities or cannot tolerate regular contact lenses, we encourage you to schedule a consultation to discuss whether scleral lenses might help. Our eye doctor will perform a thorough evaluation and explain your options in detail. With proper fitting and care, scleral lenses can provide clear, comfortable vision and improve your daily life.