Lattice Corneal Dystrophy
What Is Lattice Corneal Dystrophy?
Your cornea is normally clear and smooth, allowing light to pass through easily so you can see clearly. In lattice corneal dystrophy, an abnormal protein called amyloid builds up beneath the surface in the subepithelial region and anterior stroma, and can extend deeper over time. These deposits form branching lines that look like a lattice fence when we examine your eyes with special equipment. As the deposits increase over time, they can scatter light and reduce the clarity of your vision.
The condition usually affects both eyes, though one eye may be more severe than the other. The protein buildup can also weaken the surface of your cornea, making it more likely to develop painful erosions or abrasions. As deposits accumulate, they may create irregular astigmatism that also reduces quality of vision.
We classify lattice corneal dystrophy into several types based on the genetic mutation involved and when symptoms begin. Type I is the most common form and typically starts causing symptoms in childhood or early adulthood. Type II, also called Meretoja syndrome, may be associated with other body symptoms and often begins later in life. Type II (Meretoja syndrome) is caused by mutations in the gelsolin (GSN) gene and includes systemic features such as facial nerve involvement and skin laxity.
- Type I usually appears in the first or second decade of life
- Type II may involve nerves and other tissues beyond the eyes
- Type II is due to a GSN mutation and includes systemic findings that require coordination with primary care or neurology
- Type III and other rare variants have different genetic origins
- All types involve amyloid deposition, but the distribution, severity, and age of onset differ by subtype
Lattice corneal dystrophy is caused by mutations in specific genes that control protein production in your cornea. Type I is most often linked to mutations in the TGFBI gene. Type II is associated with gelsolin (GSN) mutations. Type I follows an autosomal dominant inheritance pattern. This means you only need to inherit one copy of the mutated gene from one parent to develop the condition.
If one of your parents has lattice corneal dystrophy, you have a 50 percent chance of inheriting the gene mutation. However, some cases occur without a family history due to new spontaneous mutations. Genetic testing can be confirmatory but is not required in classic cases; genetic counseling can help families understand inheritance and variability.
Recognizing Symptoms and Warning Signs
The first symptoms of lattice corneal dystrophy often appear in childhood or the teenage years, though some people do not notice problems until later. You may experience blurred or hazy vision that seems to worsen gradually over months or years. Glare and sensitivity to bright lights, especially at night or when driving, are also common early complaints.
Many patients report that their vision seems foggy or that looking through their eyes is like peering through frosted glass. These changes may be subtle at first and become more noticeable as the protein deposits increase.
Recurrent corneal erosions are a hallmark symptom of lattice corneal dystrophy and can cause significant discomfort. These erosions happen when the outer layer of your cornea does not stick properly to the tissue underneath, often breaking open during sleep or upon waking. You may feel sharp pain, intense burning, or the sensation that sand or grit is stuck in your eye.
- Pain often occurs suddenly, especially when you first open your eyes in the morning
- The affected eye may become red, watery, and sensitive to light
- Episodes may last hours to days before healing
- Erosions can happen repeatedly over weeks or months
Lattice corneal dystrophy is a progressive condition, meaning symptoms generally worsen as you age. The deposits in your cornea become more dense and widespread, leading to greater vision impairment. The frequency of painful erosions may also increase over time, though this varies from person to person.
Many people need conservative treatments for comfort earlier in life, and some will require procedures or surgery when vision or erosions significantly affect daily activities. We monitor your condition closely to determine the best time to intervene with more advanced treatments.
While lattice corneal dystrophy itself is not a medical emergency, certain symptoms require prompt attention. Seek care immediately if you experience sudden severe pain that does not improve, a significant sudden decrease in vision, or signs of infection such as thick discharge or increasing redness. A corneal erosion that does not heal within a few days or keeps recurring frequently also warrants an urgent visit.
If you have had a recent injury to your eye or if light becomes so painful that you cannot keep your eye open, contact our office or seek emergency care right away.
- If you wear contact lenses and develop a painful red eye, discharge, or sudden drop in vision, remove the lenses and seek urgent care
- Severe pain with light sensitivity and no improvement after usual measures requires prompt evaluation
Risk Factors and Causes
Lattice corneal dystrophy is almost always caused by inherited genetic mutations. The most common culprit is a mutation in the TGFBI gene, which provides instructions for making a protein in the cornea. When this gene is altered, abnormal amyloid protein accumulates in the corneal tissue instead of being cleared away normally.
Because this is a genetic condition, it cannot be prevented or caused by lifestyle factors, environmental exposures, or eye injuries. You are born with the mutation, though symptoms may not appear until later.
Anyone who inherits the genetic mutation can develop lattice corneal dystrophy, regardless of gender or ethnicity. However, the condition is rare, affecting only a small number of people worldwide. Having a parent or sibling with the condition significantly increases your risk.
- People with a family history of corneal dystrophies are at higher risk
- No particular ethnic group is more commonly affected by Type I
- Type II is more common in people of Finnish descent
- Both men and women are equally likely to develop this condition
Founder mutations exist in some regions, but Type I occurs worldwide.
Most people with Type I lattice corneal dystrophy begin experiencing symptoms in childhood or early adulthood, typically between ages 5 and 20. However, the severity and timing can vary even within the same family. Some individuals may not notice vision problems until their 30s or 40s.
If you have a known family history of lattice corneal dystrophy, we may recommend screening examinations even before symptoms appear. Early detection allows us to monitor the condition and plan treatment before vision becomes significantly affected.
How We Diagnose Lattice Corneal Dystrophy
When you come in with symptoms that might suggest lattice corneal dystrophy, we begin with a comprehensive eye examination. We will ask about your symptoms, family history of eye conditions, and when you first noticed changes in your vision or eye comfort. A standard vision test measures how well you can see at various distances.
We also conduct a thorough examination of the front surface of your eyes using specialized instruments that let us see the layers of your cornea in detail. This painless process helps us identify the characteristic lattice lines and protein deposits.
- Corneal topography or tomography to assess curvature and irregular astigmatism
- Anterior segment OCT to visualize deposit depth
- In vivo confocal microscopy in selected cases to characterize deposits
- Corneal sensitivity testing if Type II is suspected
The slit lamp is our most important tool for diagnosing lattice corneal dystrophy. This microscope with a bright light allows us to examine your cornea at high magnification. During the exam, you will rest your chin and forehead on supports while we shine a narrow beam of light into your eye.
- We look for branching, refractile lines that resemble a lattice pattern
- These deposits typically appear in the central and mid-peripheral cornea
- We assess the density and depth of the protein accumulation
- We check for areas of corneal thinning or previous erosions
- We evaluate both eyes, as the condition is usually bilateral
Genetic testing can confirm the diagnosis of lattice corneal dystrophy and identify the specific mutation responsible. We may recommend testing especially if your family history is unclear or if we need to distinguish between different types of corneal dystrophies. A simple blood sample or cheek swab is sent to a specialized laboratory for analysis. Testing is optional in classic presentations but helpful for atypical cases or family planning; genetic counseling can help families understand inheritance and variability.
If you have been diagnosed with this condition, we may suggest that your family members undergo screening examinations. Finding the condition early in relatives allows for better monitoring and timely treatment. For suspected Type II, we coordinate evaluation for systemic features.
Several other corneal conditions can cause similar symptoms, so we carefully rule out alternative diagnoses. Other corneal dystrophies, such as granular or Reis-Bucklers dystrophy, can also create deposits but have different patterns. Infections, inflammatory conditions, and scars from previous injuries can cloud the cornea as well. We also consider granular-lattice combined dystrophy (Avellino) and epithelial basement membrane dystrophy, which commonly cause recurrent erosions.
The distinctive lattice pattern seen on slit lamp examination, combined with your family history and genetic testing if needed, helps us make an accurate diagnosis. Correct identification is important because different corneal conditions require different treatment approaches.
Non-surgical Management
When lattice corneal dystrophy is mild and not significantly affecting your vision or comfort, we often begin with conservative management. Regular monitoring with eye exams allows us to track how the condition progresses. We educate you about the condition and what symptoms to watch for so you know when to seek additional care.
Early-stage treatment focuses on maintaining eye comfort and preventing complications like recurrent erosions. Simple measures can keep you comfortable and preserve your vision for many years before more advanced interventions become necessary.
Artificial tears and lubricating eye ointments are often the first treatments we recommend. These products help keep your corneal surface moist and smooth, reducing irritation and lowering the risk of erosions. Preservative-free formulations are usually best for frequent use.
- Use lubricating drops throughout the day as needed for comfort
- Apply thick ointments at bedtime to protect your cornea overnight
- Nighttime lubrication is especially important to prevent morning erosions
- These products do not stop the disease but can improve symptoms
- Use hypertonic 5 percent saline drops or ointment, especially at bedtime, to reduce epithelial edema and help prevent erosions
If you experience frequent or severe corneal erosions despite using lubricants, we may recommend a bandage contact lens. This special soft lens acts like a protective shield over your cornea, allowing the surface to heal and stay intact. The lens remains in your eye continuously for weeks or months while we monitor healing.
Bandage lenses can dramatically reduce pain and speed recovery from erosions. We will teach you how to care for the lens and watch for signs of infection, which is a rare but important risk.
- We prescribe a prophylactic topical antibiotic while the lens is worn to reduce infection risk
- You will have scheduled follow-up visits for lens care, replacement, and to check for complications
- Call urgently for increased pain, light sensitivity, redness, or discharge
When erosions continue despite lubricants and bandage lenses, we have several additional treatment approaches. These interventions target the underlying weakness in the corneal surface to reduce erosion frequency and severity.
- Hypertonic saline 5 percent drops or ointment, especially at bedtime
- Short course of oral doxycycline with a topical corticosteroid to reduce matrix metalloproteinase activity
- Anterior stromal puncture outside the visual axis for focal, stubborn erosions
- Epithelial debridement with diamond burr polishing when adhesion defects persist
- Autologous serum tears in refractory cases
If deposits cause irregular astigmatism that reduces your vision quality but not enough to require surgery, specialized contact lenses may help. These lenses create a smooth optical surface over your irregular cornea, often improving vision significantly.
- Rigid gas permeable lenses to neutralize irregular astigmatism
- Scleral lenses to vault the cornea and improve comfort and optics
- Updated glasses prescriptions for residual refractive error
Procedures and Surgery
Phototherapeutic keratectomy is a laser procedure we may recommend when deposits are affecting your vision or when recurrent erosions do not improve with simpler treatments. During PTK, we use an excimer laser to gently remove the surface layers of your cornea, including areas with protein deposits. This allows healthier tissue to grow back and can improve vision and comfort.
The procedure is performed in a laser suite or outpatient surgery center, usually with numbing eye drops. Recovery typically takes several days to weeks, and you may need to wear a bandage contact lens afterward. PTK can provide significant relief, though deposits may eventually return as the condition progresses.
- Temporary light sensitivity and discomfort are common during healing
- Possible hyperopic shift and induced irregular astigmatism
- Risk of corneal haze
- Deposits often recur over months to years; repeat PTK can be considered
- Bandage contact lens and prophylactic drops are typically used during recovery
Elective refractive surgery such as LASIK or PRK to reduce glasses dependence is not recommended in TGFBI-related dystrophies.
When lattice corneal dystrophy severely impairs your vision or causes problems that cannot be managed with other treatments, corneal transplant surgery may become necessary. When needed, we consider deep anterior lamellar keratoplasty (DALK) when your endothelium is healthy, or penetrating keratoplasty (PK) if full-thickness replacement is required; endothelial keratoplasty is not effective for this stromal condition.
Transplant surgery can restore vision in lattice dystrophy, though results vary. However, the abnormal protein deposits can sometimes recur in the transplanted tissue over many years.
- Graft rejection is possible, especially after PK; you will use topical steroid drops long term
- Sutures require monitoring and selective removal over months to optimize vision and astigmatism
- Recurrence of deposits in the graft can occur, often years after surgery
- Most patients see meaningful visual improvement, but results vary
- Regular follow-up is essential to detect rejection or recurrence early
The decision to proceed with surgical treatment depends on how much the condition is affecting your quality of life and vision. We typically consider surgery when your vision has declined to the point that it interferes with daily activities like reading, driving, or work. Frequent painful erosions that do not respond to conservative treatment may also prompt us to recommend surgery.
- We evaluate your visual acuity and how well you function day to day
- The density and location of corneal deposits guide our timing
- Your age, overall health, and personal goals factor into the decision
- We discuss risks and benefits thoroughly before proceeding
- We often trial scleral or rigid gas permeable lenses before proceeding to surgery if vision is limited by irregular optics
- We consider PTK before transplant when deposits are more superficial
Living with Lattice Corneal Dystrophy
Taking good care of your eyes every day can help manage symptoms and reduce complications from lattice corneal dystrophy. Use your prescribed lubricating drops and ointments consistently, especially at night before bed. Protect your eyes from injury by wearing safety glasses during activities like yard work or sports.
- Keep your bedroom air humidified to prevent overnight dryness
- Wear sunglasses outdoors to reduce glare and light sensitivity
- Avoid rubbing your eyes, which can trigger erosions
- Stay well hydrated by drinking plenty of water throughout the day
- Use moisture chamber goggles at night if you sleep with your eyes partially open or in dry environments
- Avoid strong air flow toward your eyes from fans or vents, especially at night
- Do not use leftover numbing drops; they delay healing and can damage the cornea
Regular follow-up examinations are essential for monitoring lattice corneal dystrophy and adjusting your treatment plan as needed. In the early stages, we may want to see you every 6 to 12 months. If your condition is progressing or you have had recent treatments, visits may be more frequent.
During these appointments, we check your vision, examine your corneas with the slit lamp, and discuss any new symptoms or concerns. These visits help us catch changes early and intervene before problems become more severe.
If you experience a corneal erosion, there are steps you can take at home to ease discomfort while your eye heals. Apply lubricating ointment frequently to keep the surface moist. Try to avoid bright lights and give your eye a chance to rest. Over-the-counter pain relievers can help manage discomfort. Do not use topical anesthetic drops at home. Avoid eye patching unless specifically directed by your clinician.
Do not wear regular contact lenses during an erosion, and avoid activities that might expose your eye to further injury. If the erosion does not improve within a day or two, or if pain becomes severe, contact our office for further guidance.
Many people with lattice corneal dystrophy continue to work and enjoy most activities, especially in the early stages. However, tasks requiring sharp vision, such as reading fine print or driving at night, may become challenging as the condition progresses. You may need brighter lighting for close work and may benefit from larger-print books or screen magnification.
We can provide guidance on workplace accommodations and assistive devices that help you maintain independence and productivity. Most people adapt well with appropriate treatment and support.
Know the warning signs that mean you should contact us or seek urgent care right away. These include sudden vision loss, severe eye pain that does not improve with usual measures, and signs of infection like yellow or green discharge. If you see flashes of light or floaters, experience double vision, or sustain any injury to your eye, seek immediate attention. Contact lens wearers should seek urgent care for pain, redness, or discharge even if symptoms seem mild.
Even if you are unsure whether your symptoms are urgent, we would rather you call and check than wait and risk complications. Prompt treatment of problems can prevent permanent vision loss.
Frequently Asked Questions
Complete blindness from lattice corneal dystrophy is rare, especially with modern treatments available. While the condition can significantly impair vision over time, interventions like laser treatment and corneal transplant surgery can restore and preserve sight. Most people maintain functional vision throughout their lives with proper care and timely treatment.
Currently, there is no cure that permanently eliminates the genetic cause of lattice corneal dystrophy. However, treatments can effectively manage symptoms, restore vision, and improve quality of life. Even after corneal transplant surgery, the underlying genetic defect remains and deposits may slowly recur over many years. Ongoing research into gene therapies may one day offer more definitive solutions.
If you have lattice corneal dystrophy Type I, each of your children has a 50 percent chance of inheriting the gene mutation because the condition follows an autosomal dominant pattern. However, inheriting the gene does not always mean symptoms will be as severe as yours, since expression can vary. Penetrance is high but expression varies, so severity can differ among family members. Genetic counseling can help you understand the risks and options for your family.
Elective corneal laser vision correction is generally not recommended in TGFBI-related dystrophies because it can accelerate deposits and worsen vision. We will discuss safer alternatives for vision correction.
Many people with lattice corneal dystrophy only need one corneal transplant in their lifetime, if they need one at all. Transplanted corneas often remain clear and functional for many years, though the deposits can gradually recur because the underlying genetic problem persists. If a repeat transplant becomes necessary, it is usually not needed for at least 10 to 20 years or longer after the first surgery. If recurrence in the graft occurs, it may take several years to become visually significant, and many patients do not require repeat surgery for a decade or longer.
Lattice corneal dystrophy typically affects both eyes, though the severity and rate of progression may differ between them. One eye may develop deposits earlier or more densely than the other. In rare cases, symptoms may seem limited to one eye initially, but examination usually reveals changes in both eyes.
Wearing regular contact lenses with lattice corneal dystrophy depends on the stage and severity of your condition. In early stages with minimal deposits and no active erosions, contact lenses may be safe if your corneal shape and health are otherwise suitable. However, if you have frequent erosions or advanced deposits, contact lenses could increase your risk of complications. We can assess whether contact lenses are appropriate for your specific situation.
Getting Help for Lattice Corneal Dystrophy
If you are experiencing vision changes, eye pain, or have a family history of lattice corneal dystrophy, we encourage you to schedule a comprehensive eye examination. Early diagnosis and appropriate management can preserve your vision and quality of life for many years. Our ophthalmologist will work with you to develop a personalized treatment plan that addresses your unique needs and goals. Referral to a cornea specialist is appropriate if procedures or surgery are being considered.