Fleck corneal dystrophy is a rare inherited eye condition that causes tiny, pale flecks in the clear front layer of the eye. It is usually present for life, but many people with Fleck corneal dystrophy have no vision problems and only learn about it during a routine eye exam. For some, the first sign may be a small change they brush off at first, but early signs of Fleck corneal dystrophy are often noticed by an eye doctor rather than felt day to day. Not everyone will have the same experience, though this condition is usually mild and does not affect life expectancy. Treatment is often not needed, but regular eye checks can help monitor eye health and rule out other causes of corneal changes.
How many people live with Fleck corneal dystrophy?
No single authoritative source consistently reports how many people live with Fleck corneal dystrophy worldwide or in the United States. Rare disease references such as Orphanet describe it as very rare, but I am not aware of a dependable recent global or U.S. headcount for this condition.
Overview
Fleck corneal dystrophySymptoms
Many with Fleck corneal dystrophy have no symptoms at all and only learn about it during an eye exam. When signs do occur, they may include mild blurred vision, light sensitivity, or glare, though vision often stays normal.
Outlook and prognosis
Most people with Fleck corneal dystrophy keep normal vision throughout life, and the tiny corneal spots often stay stable. Some may notice mild glare or blurred vision, but serious sight loss is uncommon and regular eye checks are usually enough.
Causes and risk factors
Fleck corneal dystrophy is caused by a change in the PIKFYVE gene, usually inherited from one parent, though it can start as a new genetic change. Lifestyle and environmental factors do not cause it, but eye irritation or other eye problems may affect symptoms.
Genetic influences
Genetics are central to Fleck corneal dystrophy. It is usually caused by changes in the PIKFYVE gene and is often inherited in an autosomal dominant pattern, meaning a parent with the variant can pass it on to a child.
Diagnosis
Fleck corneal dystrophy is usually diagnosed during an eye exam when a specialist sees typical corneal changes. A slit-lamp exam confirms these clinical features. Genetic testing can support the diagnosis of Fleck corneal dystrophy, especially if family history is unclear.
Treatment and drugs
Fleck corneal dystrophy often does not need active treatment because vision usually stays normal. If the eyes feel dry or irritated, lubricating eye drops may help. Regular eye exams help track any changes and rule out other eye problems.
Symptoms
Most people with Fleck corneal dystrophy go about daily life with normal sight and no eye pain. For many people with Fleck corneal dystrophy, the early features of Fleck corneal dystrophy are so subtle that it is first found during a routine eye exam. The main sign is many tiny flecks in the cornea, the clear front part of the eye. These spots usually do not damage vision or cause major day-to-day problems.
Small white, gray, or see-through spots can appear in the cornea, the clear window at the front of the eye. These are usually noticed by an eye doctor during a close exam rather than by the person affected.
Fleck corneal dystrophy usually affects both eyes. The pattern may not look exactly the same on each side, but the overall finding is often similar.
Most people with Fleck corneal dystrophy keep normal vision and do not have redness, pain, or a gritty feeling. Many only learn they have it during an eye check for glasses, contact lenses, or another routine reason.
Some may notice slight blur, glare, or halos around lights, especially in bright settings. If vision changes are more than mild or come with pain, an eye doctor will usually check for another cause.
How people usually first notice Fleck corneal dystrophy?
Fleck corneal dystrophy is often first noticed by chance during a routine eye exam, when an eye doctor sees many tiny white or gray-white flecks scattered through the clear front surface of the eye, called the cornea. For many people, the first signs of Fleck corneal dystrophy do not cause obvious symptoms at all, so vision usually stays normal and there may be no pain, redness, or irritation. When symptoms do happen, they are usually mild, and families may only learn about the condition after an eye check in childhood, early adulthood, or when a relative is diagnosed.
Types of Fleck corneal dystrophy
No distinct types of Fleck corneal dystrophy are widely recognized.
Can I slow down the onset of symptoms?
No, there is no good evidence that diet, exercise, supplements, or other lifestyle changes can meaningfully delay the start of symptoms in fleck corneal dystrophy, because it is an inherited condition that affects the clear front layer of the eye. Routine eye exams and protecting your eyes from injury are still important for overall eye health, but they have not been shown to prevent or postpone this condition itself. The encouraging part is that many people living with fleck corneal dystrophy never notice symptoms, or only have mild ones, so regular follow-up can help if any vision changes appear.
What genetics can tell you about symptoms
In fleck corneal dystrophy, genetics can confirm the diagnosis because this condition is usually linked to changes in a gene called PIKFYVE. Even so, the genetic result does not reliably predict exactly which eye changes someone will have, how noticeable they will be, or when they will first be found, since many people have few or no symptoms and the condition is often discovered during a routine eye exam. In general, people with the same genetic change can still have different day-to-day experiences, so genetics is more helpful for identifying the condition than for forecasting symptom severity.
Causes and risk factors
Most cases of Fleck corneal dystrophy are linked to a change in the PIKFYVE gene, and this change can be inherited or happen for the first time in one person. The main risk factor is a family history of Fleck corneal dystrophy, especially if a parent has it. Genetic testing can sometimes clarify your personal risk. Lifestyle and environmental factors are not known to cause Fleck corneal dystrophy. Age or a routine eye exam may affect when it is found, but they do not appear to be the underlying cause.
What are the most common causes or risk factors?
Fleck corneal dystrophy is usually caused by an inherited change in a gene called PIKFYVE, so the main risk factor is having a parent or close family member with the condition. It is present from birth at the gene level, even though many people do not notice any eye problems for years or ever. There are no well-proven lifestyle or environmental risk factors, which means it is not thought to be caused by things like diet, screen use, injury, or infection.
Environmental and biological risk factors
For Fleck corneal dystrophy, doctors have not identified clear environmental or non-genetic biological risk factors. Awareness of both biological and environmental influences helps you feel prepared. In practical terms, there is no good evidence that everyday exposures, pregnancy-related conditions, or birth events reliably make Fleck corneal dystrophy more likely.
No common environmental exposure has been proven to raise the chance of Fleck corneal dystrophy. Ordinary factors such as reading, screen use, routine sunlight, or dry air are not known causes.
Advanced maternal or paternal age has not been established as a risk factor for Fleck corneal dystrophy. Unlike some congenital conditions, no consistent age-related pattern has been shown.
Researchers have not found a clear link between Fleck corneal dystrophy and pregnancy illnesses, medicines, radiation, or pollution. There is no recognized exposure pattern during pregnancy that reliably predicts the condition.
Prematurity, low birth weight, and delivery complications are not known to increase the likelihood of Fleck corneal dystrophy. Birth injury and routine newborn care have not been shown to cause it.
Genetic risk factors
When Fleck corneal dystrophy runs in a family, the reason is usually a change in a single gene that affects cells in the cornea, the clear front surface of the eye. Most known cases are linked to PIKFYVE, and the condition is usually inherited in an autosomal dominant pattern, so one changed copy can be enough. Some families have such mild eye findings that the condition is not recognized for years. In some cases, genetic testing can give a clearer picture of your personal risk.
PIKFYVE changes: Most known genetic causes of Fleck corneal dystrophy involve a change in the PIKFYVE gene. This change affects how corneal cells handle tiny internal compartments, which leads to the fleck-like spots seen on an eye exam.
Autosomal dominant: Fleck corneal dystrophy is usually passed down in an autosomal dominant pattern, which means one changed copy of the gene can be enough to cause it. If a parent carries the change, each child has a 1 in 2, or 50%, chance of inheriting it.
Family history: Having a parent, sibling, or other close relative with Fleck corneal dystrophy raises the chance that the same gene change is present in the family. Because early symptoms of Fleck corneal dystrophy are often absent, it may be passed through generations without anyone realizing it.
New mutation: Rarely, Fleck corneal dystrophy can appear in someone with no known family history because the genetic change happened for the first time in that person. If that occurs, the condition can still usually be passed on to future children.
Lifestyle risk factors
Fleck corneal dystrophy is an inherited corneal condition, so lifestyle habits do not cause it. In most people it remains stable and causes few or no symptoms, but daily habits can still affect eye comfort, surface irritation, and how noticeable visual symptoms become. When people ask about lifestyle risk factors for Fleck corneal dystrophy, the main issue is not triggering the dystrophy itself but worsening dryness, irritation, or stress on the cornea.
Frequent or forceful eye rubbing can irritate the corneal surface and make discomfort more noticeable in someone with Fleck corneal dystrophy. It may also worsen coexisting dry eye or minor surface injury, which can affect day-to-day vision quality.
Poorly fitted lenses, overuse, or sleeping in contacts can stress the corneal surface and increase irritation. In Fleck corneal dystrophy, this may not change the inherited deposits themselves, but it can make symptoms such as foreign-body sensation, blur, or redness more likely.
Long screen time, low blink rate, and inadequate hydration can worsen tear film instability and dry eye symptoms. How lifestyle affects Fleck corneal dystrophy is often through this added surface dryness, which can make vision fluctuate more even if the dystrophy stays unchanged.
High sunlight exposure without proper eye protection can increase light sensitivity and ocular surface irritation. In people with Fleck corneal dystrophy, this may make otherwise mild visual disturbance or discomfort more noticeable outdoors.
Risk prevention
Fleck corneal dystrophy is an inherited eye condition, so there is no proven way to prevent the condition itself if you carry the gene change. For most people, prevention is really about protecting the surface of the eye, avoiding added irritation, and having eye checks so any changes are picked up early. Different people need different prevention strategies—there’s no single formula, especially since many living with Fleck corneal dystrophy have few or no symptoms and may only learn about it during an eye exam.
Routine visits with an eye doctor can help monitor Fleck corneal dystrophy and make sure nothing else is affecting your vision. This is also the best way to sort out Fleck corneal dystrophy from other causes of cloudy vision or the early symptoms of Fleck corneal dystrophy if changes are noticed.
Protecting your eyes during sports, yard work, or dusty jobs can lower the chance of scratches and irritation. Simple safety glasses or goggles can help prevent added problems on top of Fleck corneal dystrophy.
If you wear contact lenses, careful cleaning and not overwearing them can reduce irritation and infection risk. Some people with Fleck corneal dystrophy may find their eyes are more comfortable with glasses if lenses cause dryness or rubbing.
Keeping the eyes well lubricated with doctor-approved artificial tears may help if you have dryness, burning, or a gritty feeling. Alongside medical care, everyday habits also matter, such as taking screen breaks and avoiding very dry or smoky air.
Can you prevent Fleck corneal dystrophy?
No, Fleck corneal dystrophy cannot usually be prevented because it is an inherited eye condition that people are born with in their genes. Regular eye checkups and general eye protection are still helpful for overall eye health, but they do not prevent this condition from developing.
Transmission
Fleck corneal dystrophy is not infectious, so it does not spread from one person to another through touch, tears, the air, or shared items. Instead, how Fleck corneal dystrophy is inherited is usually the key issue: it is most often passed down in families through a gene change.
In many families, if one parent has the gene change, each child has a 1 in 2, or 50%, chance of inheriting it. Sometimes Fleck corneal dystrophy appears in someone with no known family history, which can happen because of a new gene change.
When to test your genes
For fleck corneal dystrophy, genetic testing is usually not needed for early detection because it is often harmless and found on an eye exam. It can be helpful if the diagnosis is uncertain, if several relatives are affected, or if you want clearer information for family planning and inherited risk.
Diagnosis
Fleck corneal dystrophy is often found during an eye exam, sometimes before it causes any day-to-day problems. Many living with Fleck corneal dystrophy have few or no symptoms, while others may notice mild glare or blurred vision that leads them to seek care. Getting a diagnosis is often a turning point toward answers and support. The diagnosis of Fleck corneal dystrophy is usually based on its distinctive appearance in the clear front window of the eye and may be confirmed with genetic testing.
An eye doctor usually starts with a routine eye exam and a slit-lamp exam, which uses a bright light and microscope to look closely at the cornea. In Fleck corneal dystrophy, they look for many tiny, scattered flecks in both corneas that have a very characteristic pattern.
Visual acuity testing checks how clearly you see at distance and near, even if your eyes feel mostly normal. This helps show whether Fleck corneal dystrophy is affecting vision or whether the corneal changes are present without major sight problems.
Your provider may suggest corneal photographs or scans to look closer and document where the flecks sit within the cornea. These imaging findings can help confirm the typical pattern and follow it over time if needed.
A detailed family and health history can help because this condition can run in families. Doctors may ask whether relatives were told they had unusual corneal spots, early eye findings, or a known inherited eye condition.
How is Fleck corneal dystrophy diagnosed?
Fleck corneal dystrophy is usually diagnosed during a full eye exam, when an eye doctor looks at the clear front part of the eye with a bright light and microscope and sees the tiny, scattered white or gray flecks that are typical of this condition. Doctors may also ask about family history and check that vision is otherwise normal, since many people living with fleck corneal dystrophy have few or no symptoms. Genetic testing can sometimes help confirm the diagnosis, especially if the eye findings are not fully clear or other family members have similar changes.
Stages of Fleck corneal dystrophy
Fleck corneal dystrophy does not have defined progression stages. This is because it is usually a stable eye finding rather than an illness that predictably moves from mild to severe over time, and many people have few or no symptoms of Fleck corneal dystrophy. Doctors usually start with a slit-lamp eye exam, where an eye specialist looks closely at the clear front surface of the eye and can see the tiny flecks. If needed, follow-up visits, family history, and sometimes genetic testing help confirm the diagnosis and make sure another corneal condition is not being mistaken for Fleck corneal dystrophy.
Outlook and prognosis
The outlook for people with Fleck corneal dystrophy is generally excellent, because it is usually a benign, nonprogressive or only very slowly progressive condition that does not significantly affect vision. Most people remain asymptomatic throughout life, and many are diagnosed incidentally during an eye examination. When symptoms do occur, they are typically mild, such as slight glare or blurred vision, and severe visual loss is uncommon. Life expectancy is normal, and Fleck corneal dystrophy is not associated with increased mortality. Regular follow-up with an eye specialist may be advised to monitor for rare visual changes or to distinguish it from other corneal disorders.
Long-term effects
For most people, Fleck corneal dystrophy has a very good long-term outlook and does not lead to major day-to-day problems. The small cloudy spots in the cornea usually remain present over time, but they often stay stable and do not damage vision. It’s important to remember that long-term doesn’t always mean progressive. In many living with Fleck corneal dystrophy, the condition is found during a routine eye exam rather than after noticeable changes.
The tiny flecks in the clear front part of the eye usually persist for life. In most people, they change little over the years and do not spread in a way that affects overall eye health.
Most people with Fleck corneal dystrophy keep normal or near-normal vision throughout life. When people search for early signs of Fleck corneal dystrophy, they often find that there are few or no noticeable visual changes at all.
A small number of people may notice mild blur, glare, or halos, especially in certain lighting. These effects are usually limited and are not the typical long-term pattern.
For many, symptoms are so mild that reading, driving, work, and screen use stay unchanged. Some may only become aware of the condition after an eye doctor points out the flecks during an exam.
How is it to live with Fleck corneal dystrophy?
For many people living with Fleck corneal dystrophy, daily life changes very little because this inherited corneal condition usually does not affect vision in a meaningful way and is often found by chance during an eye exam. Some may notice mild light sensitivity, glare, or occasional eye discomfort, but most continue school, work, driving, and reading without major limits. The biggest impact is often not physical but practical and emotional: keeping up with routine eye care, understanding that the condition is usually stable and benign, and sometimes talking with relatives because it can run in families.
Treatment and drugs
Fleck corneal dystrophy usually does not need active treatment because it often causes little or no change in day-to-day vision. If mild irritation, dryness, or a gritty feeling happens, treatment for Fleck corneal dystrophy is usually simple, such as lubricating eye drops or ointment to keep the surface of the eye comfortable. Supportive care can make a real difference in how you feel day to day. Surgery or stronger medicines are rarely needed unless another eye problem is also present, since Fleck corneal dystrophy itself is generally harmless and tends to stay stable over time. Regular eye exams help your eye doctor watch for changes and make sure symptoms are not coming from a different condition.
Can you cure Fleck corneal dystrophy?
No, there is no cure for Fleck corneal dystrophy at this time, but it is usually mild and often does not need treatment. For many people living with this condition, care is mainly regular eye checkups and treating any eye irritation or other eye problems that may be affecting vision.
Non-drug treatment
Most people living with Fleck corneal dystrophy do not need active treatment in day-to-day life, because vision often stays normal and the corneal spots usually do not cause discomfort. Care is mainly about protecting vision, checking for changes over time, and addressing any related problems such as glare, eye strain, or a need for updated glasses. Managing this condition often means regular follow-up with an eye specialist rather than starting a medicine or procedure right away.
Regular eye exams are the main non-drug approach for Fleck corneal dystrophy. These visits help track whether the corneal changes stay stable and check for other eye problems that could affect vision.
If vision is blurred from a refractive error, glasses or contact lenses may help you see more clearly even though they do not remove the corneal flecks. For many, treatment begins not at the pharmacy, but with an updated vision prescription that makes reading, driving, or screen time easier.
Some people with Fleck corneal dystrophy may also notice dryness, irritation, or eye fatigue, especially after long hours on a computer or in air-conditioned rooms. Non-drug steps such as taking screen breaks, using a humidifier, and avoiding smoke or wind can help reduce irritation.
Good eye-protection habits can support comfort and help prevent separate injuries that could make vision problems harder to sort out. This includes wearing protective eyewear for sports or dusty work and avoiding frequent eye rubbing.
Your genes may have an impact on how drugs work for you
For people with fleck corneal dystrophy, treatment is often little to none, and when care is needed it is usually simple comfort care like lubricating eye drops, so genes do not usually play a major role in how these medicines work. In other words, the gene change linked to this eye condition is important for causing the tiny spots in the clear front of the eye, but it is not known to consistently change how the usual treatments are absorbed or how well they help. Because of that, genetic drug testing is not a routine part of care for this condition.
Pharmacological treatments
Most people with Fleck corneal dystrophy do not need medication, because it usually does not affect vision or cause ongoing symptoms. There is no drug that removes the corneal flecks or changes the underlying condition. When symptoms do happen, treatment is aimed at comfort, such as easing dryness, irritation, or the gritty feeling that can mimic early symptoms of Fleck corneal dystrophy. Not everyone responds to the same medication in the same way.
There is no approved medicine that treats the root cause of Fleck corneal dystrophy. For many living with Fleck corneal dystrophy, doctors simply monitor the eyes unless symptoms develop.
Lubricating eye drops are the most common treatment if the eyes feel dry, scratchy, or mildly irritated. These drops help support the tear film and can make day-to-day activities like reading or screen use more comfortable.
Thicker eye ointments or gels may be used, especially at night, if symptoms are more noticeable on waking. Sometimes medicines are taken short-term, while others are used long-term, and these products are mainly for comfort rather than changing the cornea itself.
If there is a separate surface problem such as a corneal scratch or erosion, an eye specialist may prescribe short-term medicated drops based on the cause. This can include antibiotic eye drops to prevent infection or other prescription drops for inflammation, but these are not routine treatment for Fleck corneal dystrophy itself.
Genetic influences
Because Fleck corneal dystrophy often causes few day-to-day problems, many living with it only learn it may run in the family after a routine eye exam. It’s natural to ask whether family history plays a role. Fleck corneal dystrophy is usually caused by a change in a gene called PIKFYVE, and it is most often passed down in an autosomal dominant pattern, meaning a parent with the condition can pass it to a child with a 1 in 2 chance. This gene helps corneal cells handle and recycle material properly, so when it is altered, tiny fleck-like changes can build up in the clear front layer of the eye. Even so, symptoms can be very mild or absent, so some families do not realize they have Fleck corneal dystrophy until several relatives are examined. If you are wondering whether Fleck corneal dystrophy is inherited in your family, genetic counseling and, in some cases, genetic testing can help confirm the cause and explain what it may mean for relatives.
Is Fleck corneal dystrophy genetic?
Genetics are central to Fleck corneal dystrophy. It is usually caused by changes in the PIKFYVE gene and is often inherited in an autosomal dominant pattern, meaning a parent with the variant can pass it on to a child.
Having a genetic risk is not necessarily a diagnosis
Genetic variants are a usual part of human biology and are widely found in the general population. Most do not have a direct effect on health and simply reflect normal human diversity. For many genes, having a variant linked to a condition suggests a possible association rather than a certain diagnosis, especially when several genes and environmental factors are involved. In some situations, though, one well-characterized variant in a particular gene can be enough to confirm a diagnosis.
Pharmacogenetics—how genetics influence drug effects
In Fleck corneal dystrophy, genetics usually matter more for confirming the diagnosis than for choosing a medicine. Not every difference in response is genetic, but with Fleck corneal dystrophy there is no well-established drug test that tells doctors which eye drop or medication will work better based on your genes. Genetic testing for Fleck corneal dystrophy can help separate it from other corneal conditions that may need treatment, closer follow-up, or a different plan. For many living with this condition, treatment is often minimal because vision usually stays good and the corneal spots often do not cause symptoms. If someone also has dryness, irritation, or another eye problem, doctors treat those issues in the usual way, rather than using a gene-guided drug choice. Family genetic results can still be useful, because they help with counseling, screening relatives when appropriate, and avoiding unnecessary treatments for a condition that is often harmless.
Interactions with other conditions
For most people, Fleck corneal dystrophy does not strongly interact with other diseases in a way that changes overall health. It is usually limited to the clear front surface of the eye, so unlike some other conditions that can leave spots in the cornea, Fleck corneal dystrophy is not typically a sign of a body-wide illness or a storage disorder. Interactions can look very different from person to person, but in practice many living with Fleck corneal dystrophy have no symptoms at all, and if they do have blurred vision or glare, eye doctors also look for more common causes such as dry eye, cataracts, or another corneal problem. This matters because the early symptoms of Fleck corneal dystrophy can be mild or absent, so another eye condition may be the real reason vision changes are noticed. If you have Fleck corneal dystrophy and new eye discomfort, worsening blur, or light sensitivity, it is worth checking whether a separate eye disease is also present rather than assuming the dystrophy is to blame.
How genes can cause diseases
Humans have more than 20,000 genes, each carrying out one or a few specific functions in the body. One gene instructs the body to digest lactose from milk, another tells the body how to build strong bones and another prevents the body's cells from beginning to multiply uncontrollably and developing into cancer. As all of these genes combined are the building instructions for our body, a defect in one of these genes can have severe health consequences.
Through decades of genetic research, we know the genetic code of any healthy/functional human gene. We have also identified that in certain positions on a gene, some individuals may have a different genetic letter from the one you have. We call these hotspots "Genetic Variations" or "Variants" in short. In many cases, studies have been able to show that having the genetic letter "G" in the position makes you healthy, but having the letter "A" in the same position disrupts the gene function and causes a disease. Genopedia allows you to view these variants in genes and summarizes all that we know from scientific research, which genetic letters (Genotype) have good or bad consequences on your health or on your traits.
What other conditions can cause similar symptoms to Fleck corneal dystrophy?
Fleck corneal dystrophy can be mistaken for other problems that cause tiny spots or clouding in the clear front part of the eye, especially other inherited cornea conditions like granular or lattice corneal dystrophy. Doctors may also consider rare buildup disorders, such as cystinosis or Fabry disease, as well as changes from past eye inflammation or certain medicines, because these can also leave specks in the cornea.
History
People living with Fleck corneal dystrophy often do not notice any day-to-day vision problems, so its history is mostly a story of what eye doctors saw during exams rather than what patients felt. Fleck corneal dystrophy came to medical attention when specialists began describing tiny, scattered spots in the clear front window of the eye, called the cornea, that looked unusual but usually did not seem to harm sight.
First described in the medical literature as a distinctive corneal condition in the 20th century, it was gradually separated from other disorders that can also cause cloudy or spotted changes in the cornea. Early reports focused on the pattern of small white, gray, or translucent flecks spread through the cornea, often found by chance during a routine eye check. Someone might go in for a glasses update or a work physical and learn that these corneal changes are present, even though reading, driving, and screen use feel normal.
As medical science evolved, doctors recognized that Fleck corneal dystrophy usually behaves differently from more troublesome corneal diseases. Instead of causing pain, repeated surface injury, or major loss of vision, it was increasingly understood as a condition that is often stable and mild. That shift mattered, because older descriptions of corneal dystrophies sometimes grouped together problems that we now know can have very different outcomes.
Improved slit-lamp examination, a close-up microscope exam of the eye used in clinics, helped doctors describe the flecks more clearly and follow people over time. Later research showed that the condition reflects changes inside corneal cells rather than damage limited to the eye’s surface. Researchers also came to understand that Fleck corneal dystrophy can run in families, which helped explain why similar findings sometimes appeared across generations even when no one had serious symptoms.
In more recent years, better imaging and laboratory research have refined what doctors know about Fleck corneal dystrophy and how it differs from other inherited corneal conditions. That history helps explain why many people today are told the finding is benign or only lightly symptomatic, though regular follow-up may still be advised. Knowing this background can also make the early symptoms of Fleck corneal dystrophy easier to place in context: if symptoms happen at all, they are often subtle, while the characteristic flecks are usually the main clue.