Retinopathy of prematurity is an eye condition that affects some babies born very early or with very low birth weight. It happens when blood vessels in the retina grow in an abnormal way, and early signs of retinopathy of prematurity are usually found on routine eye exams rather than by symptoms you can see at home. Not everyone will have the same experience, but mild retinopathy of prematurity can improve on its own while more severe cases can lead to retinal scarring, detachment, and vision loss. Treatment, when needed, often includes laser therapy, medicine injected into the eye, or surgery, and careful follow-up may continue for months or longer. Retinopathy of prematurity itself is not usually fatal, but babies who develop it are often medically fragile because they were born too soon.
How many people live with Retinopathy of prematurity?
Retinopathy of prematurity, an eye problem that can affect babies born very early, is usually counted as the number of babies affected each year rather than the total number of people living with it, so there is no single worldwide or U.S. total. Widely cited estimates suggest about 184,700 babies develop it worldwide each year (Blencowe et al., 2013), and about 14,000 to 16,000 babies are affected in the United States each year (National Eye Institute, 2024).
Overview
Retinopathy of prematuritySymptoms
Retinopathy of prematurity often causes no early symptoms. As it worsens, babies may have unusual eye movements, crossed eyes, or poor visual tracking, and severe retinopathy of prematurity can lead to vision loss or blindness.
Outlook and prognosis
For many living with retinopathy of prematurity, outlook depends on how early symptoms are found and treated. Mild cases often improve as the eye grows, while severe retinopathy of prematurity can lead to lasting vision problems and needs long-term eye follow-up.
Causes and risk factors
Retinopathy of prematurity mainly affects babies born very early, especially those with very low birth weight. Risk rises with extra oxygen exposure, breathing problems, infection, and overall illness in the newborn period. Genetic differences may also affect severity.
Genetic influences
Genetics may slightly affect who develops retinopathy of prematurity and how severe it becomes, but they are not the main cause. In most cases, prematurity and oxygen-related factors matter more than inherited genetic variations.
Diagnosis
Retinopathy of prematurity is diagnosed through eye exams by a pediatric eye specialist after preterm birth. The diagnosis is based on how retinal blood vessels are growing and whether there are signs of scarring or retinal pulling.
Treatment and drugs
Treatment for retinopathy of prematurity depends on how the retinal blood vessels are changing. Many babies are watched closely, while more serious retinopathy of prematurity may be treated with laser therapy, anti-VEGF eye injections, or sometimes surgery to help protect vision.
Symptoms
Retinopathy of prematurity often has no obvious symptoms at first, so parents may not notice anything unusual during feeds, naps, or play. Early on, this might look like a baby who seems comfortable and acts normally, because the early symptoms of retinopathy of prematurity are often absent. When symptoms do appear, they usually involve how the eyes look or how vision develops later in infancy or childhood. In advanced cases, retinopathy of prematurity can cause severe vision loss.
Many babies with retinopathy of prematurity do not show clear symptoms at the start. That is why routine eye screening is so important after a very early birth.
As vision develops, some babies may not follow faces, lights, or toys with their eyes as expected. This can be one of the first clues that eyesight is being affected.
One eye may drift inward or outward instead of lining up with the other eye. Parents may notice this during feeding, play, or in photos.
The eyes may make quick, repeated movements that seem to wobble or flicker. This can happen when vision is reduced and the eyes are trying to refocus.
How people usually first notice Retinopathy of prematurity?
Retinopathy of prematurity is usually not something parents can spot right away, because it develops in very premature babies and often causes no obvious early symptoms at all. In most cases, how retinopathy of prematurity is first noticed is during a routine eye screening exam in the neonatal intensive care unit, where an eye doctor sees abnormal blood vessel growth in the retina, the light-sensitive tissue at the back of the eye. If the condition becomes more advanced, families or clinicians may later notice first signs of retinopathy of prematurity such as unusual eye movements, poor visual tracking, or a white-looking pupil, but screening is the main way it is found early.
Types of Retinopathy of prematurity
Retinopathy of prematurity can affect vision in different ways depending on how far the eye blood vessels have developed and how much abnormal growth occurs. Doctors usually describe the types of retinopathy of prematurity by stage, from mild changes that may clear on their own to severe disease that can pull the retina out of place. Symptoms don’t always look the same for everyone. In many babies, there are no obvious day-to-day signs at first, which is why eye screening is so important.
Stage 1
This is the mildest form, with a thin line in the retina between normal and abnormal blood vessel growth. Babies usually do not show noticeable symptoms, and many cases improve without treatment.
Stage 2
In this stage, that line becomes a raised ridge, showing that the change in blood vessel growth is more developed. There are still often no outward symptoms, but the baby needs close follow-up because it can either settle down or progress.
Stage 3
This stage means abnormal new blood vessels are growing into the retina and nearby gel of the eye. The risk to vision is higher here, and some babies may need treatment to help prevent scarring or later vision loss.
Stage 4
At this point, scar tissue starts to pull on the retina, causing a partial retinal detachment. Vision can be affected more seriously, and urgent specialist care is usually needed.
Stage 5
This is the most severe stage, where the retina becomes completely detached. It can lead to profound vision loss or blindness, even though some babies may still not show clear early symptoms before the eye changes are found on an exam.
Aggressive posterior ROP
This fast-moving form affects the back part of the eye and can worsen more quickly than the usual stages. It may not follow the typical step-by-step pattern, so prompt treatment is often needed to protect vision.
Can I slow down the onset of symptoms?
No, there is no proven way to delay the start of retinopathy of prematurity in the usual lifestyle sense, because it is mainly linked to being born very early and to how the eyes finish developing after birth. What does help is careful care in the newborn intensive care unit, especially close control of oxygen levels and overall support for growth and health, which can lower the chance of more severe disease but cannot guarantee prevention. Babies at risk should have regular early eye checks, and if changes appear, prompt treatment can help protect vision, so staying closely connected with the care team gives your baby the best chance.
What genetics can tell you about symptoms
Genetics may help explain why some premature babies develop more severe retinopathy of prematurity than others, even when their medical care and early life risks are similar. Changes in genes involved in blood vessel growth and retinal development have been studied, and they may affect how strongly the disease develops, but genetics does not clearly predict a unique set of day-to-day symptoms in an individual baby. In most cases, prematurity, oxygen exposure, and overall illness after birth still play the biggest role in when retinopathy of prematurity starts and how serious it becomes.
Causes and risk factors
Retinopathy of prematurity is most likely in babies born very early or with a very low birth weight. The main cause is that normal blood vessel growth in the retina is interrupted after a premature birth, and the vessels may then grow in an abnormal way. Oxygen treatment can be life-saving, but high oxygen levels or big swings in oxygen can raise the risk. Serious illness after birth, such as infection, breathing problems, or poor weight gain, can also add to the risk factors for retinopathy of prematurity. It’s rarely just one factor—it’s the mix that matters, and genes may also affect how vulnerable some babies are.
What are the most common causes or risk factors?
The biggest risk factors for retinopathy of prematurity are being born very early and having a very low birth weight, because the blood vessels in the eye have not finished growing yet. Risk also goes up in babies who need extra oxygen or breathing support after birth, or who have other serious problems linked to prematurity, such as infection or lung disease. Genes are not thought to be a common cause, although they may play a small part in how likely some babies are to develop it.
Environmental and biological risk factors
Retinopathy of prematurity is most likely to affect babies born very early, especially when the eyes and the rest of the body are still developing quickly. Doctors often group risks into internal (biological) and external (environmental). For many families, the main risk factors for retinopathy of prematurity are linked to prematurity itself, oxygen needs, and serious illness in the newborn period.
The earlier a baby is born, the higher the risk of retinopathy of prematurity. This is because the blood vessels in the retina may still be developing at the time of birth.
Babies with very low birth weight have a higher chance of developing retinopathy of prematurity. Low weight often goes hand in hand with greater overall fragility and less mature eye development.
Extra oxygen can be lifesaving, but high levels or big swings in oxygen levels can raise the risk of retinopathy of prematurity. Care teams try to keep oxygen in a safe target range because both too much and too little can stress the developing retina.
Babies who need ventilators, CPAP, or prolonged oxygen support are at higher risk. Often this reflects how premature or medically unstable the baby is, not just the treatment itself.
Genetic risk factors
Retinopathy of prematurity is not usually caused by one inherited change alone, but genes can help shape how the retina’s blood vessels develop. Among the best-studied genetic risk factors for retinopathy of prematurity are changes in genes that also play a role in familial exudative vitreoretinopathy, an inherited eye condition with similar retinal findings. Carrying a genetic change doesn’t guarantee the condition will appear.
Family history: When close relatives have an inherited retinal blood vessel disorder, shared genetic susceptibility may be part of the picture. This can matter most when several family members had poor vision from early childhood or were told they had a condition similar to retinopathy of prematurity.
FZD4 gene: FZD4 helps guide normal growth of blood vessels in the retina. Rare changes in this gene have been found in some babies with severe retinopathy of prematurity, especially when the eye findings overlap with inherited retinal disease.
LRP5 gene: LRP5 works in the same signaling pathway as FZD4 and supports healthy retinal vessel development. Rare variants may raise susceptibility in a small number of infants, but they do not explain most cases of retinopathy of prematurity.
NDP gene: NDP is important for forming and maintaining retinal blood vessels early in life. Rare inherited changes in this gene can cause severe retinal disease and have also been reported in some infants first diagnosed with retinopathy of prematurity.
TSPAN12 gene: TSPAN12 helps strengthen the same vessel-growth signals used by other retinal development genes. Rare variants may increase the chance of more severe disease in a small subset of babies.
FEVR overlap: Some infants with unusually severe or atypical retinopathy of prematurity may actually have an inherited retinal condition called familial exudative vitreoretinopathy. This overlap is important because it can run in families and may point to a stronger genetic contribution.
Lifestyle risk factors
Retinopathy of prematurity is not caused by a baby's own lifestyle habits, so the main lifestyle risk factors are indirect and mostly relate to pregnancy and day-to-day infant care. In practice, how lifestyle affects retinopathy of prematurity is through influences on early growth, oxygen needs, follow-up, and the risk of later visual complications. The most relevant factors are those that can worsen overall fragility in a premature infant or make eye monitoring and treatment harder to complete.
Smoking during pregnancy can increase the chance of preterm birth and poor fetal growth, which can place a baby at higher risk for severe retinopathy of prematurity. After birth, secondhand smoke may further stress lung health and increase oxygen needs, which can complicate the course of the condition.
Inadequate maternal nutrition can contribute to poor fetal growth, and weak early infant nutrition can slow retinal and overall development after premature birth. Good feeding support and growth may help lower complications that can worsen retinopathy of prematurity.
Irregular feeding routines or difficulty meeting calorie needs can lead to poor weight gain in very premature infants, which has been linked with worse retinopathy of prematurity outcomes. Careful nutrition plans and close growth monitoring can support recovery and treatment response.
Missing eye appointments can delay detection of retinal changes that need urgent treatment. Reliable attendance for screening and follow-up is one of the most important practical factors affecting visual outcomes in retinopathy of prematurity.
Risk prevention
Retinopathy of prematurity can sometimes be lowered in risk, but it usually cannot be prevented by any one step because it is closely tied to being born very early and needing intensive newborn care. For families, prevention mostly means careful pregnancy care when possible, plus expert monitoring and oxygen management after birth if a baby arrives prematurely. Prevention is about lowering risk, not eliminating it completely. Early screening is especially important because the early symptoms of retinopathy of prematurity are often not obvious to parents.
Lowering the chance of very preterm birth can also lower the risk of retinopathy of prematurity. Good prenatal care, treatment of infections, and managing conditions such as high blood pressure may help some pregnancies continue longer.
Smoking, drug use, and heavy alcohol use during pregnancy can raise the chance of premature birth and related complications. Getting support to stop can help protect both the pregnancy and the baby's developing eyes.
If a baby is born early, care in a neonatal intensive care unit with experience in prematurity can reduce the risk of complications linked to retinopathy of prematurity. Careful control of breathing, nutrition, infection risk, and overall stability all matter.
Oxygen can be lifesaving for premature babies, but too much or poorly controlled oxygen can increase the risk of retinopathy of prematurity. NICU teams use target oxygen ranges and close monitoring to give enough support while avoiding unnecessary exposure.
Can you prevent Retinopathy of prematurity?
Retinopathy of prematurity cannot always be prevented, because the biggest risk is being born very early, often for reasons no family can fully control. The risk may be lowered by good prenatal care that helps reduce the chance of very early birth when possible, and by careful hospital care after birth, especially close control of oxygen levels in premature babies. Even with excellent care, some babies still develop it.
Transmission
Retinopathy of prematurity is not infectious, so it cannot be caught from another baby or passed through touching, coughing, breast milk, or shared air. If you are wondering how retinopathy of prematurity spreads, the key point is that it does not spread between people at all.
For many families, this means the risk is linked to being born very early and to how the blood vessels in the retina develop after premature birth, not to contact with someone who is sick. Retinopathy of prematurity is most common in very premature babies, especially those with very low birth weight and other medical needs in the newborn period.
When to test your genes
For retinopathy of prematurity, genetic testing is not part of routine early detection or usual care. What matters most is timely eye screening for babies born very early or very small, because those exams catch risk early and guide treatment. Genetic testing may be considered only rarely, if the eye findings suggest another inherited retinal condition.
Diagnosis
Retinopathy of prematurity is usually found during routine eye screening in babies who are born very early or at very low birth weight, often before there are any obvious day-to-day signs for families to notice. Doctors usually begin with a careful review of how early a baby was born, birth weight, oxygen needs, and overall newborn course, because these factors help show who is most likely to need screening. The diagnosis of retinopathy of prematurity is then based on a detailed eye exam that looks at how the blood vessels in the retina are developing.
The care team checks gestational age, birth weight, and newborn intensive care history to decide whether screening is needed. Babies born earliest or who had a more complicated course are usually watched most closely.
An eye doctor examines the retina after using drops to widen the pupils. This bedside exam shows whether retinal blood vessels are developing normally or whether there are signs of retinopathy of prematurity.
The doctor records where the changes are in the retina and how severe they are. This staging helps explain how retinopathy of prematurity is diagnosed and whether it is mild, progressing, or needs treatment soon.
The exam also looks for swollen and twisted blood vessels, which is called plus disease. This is an important sign that the condition is more active and may need urgent treatment.
How is Retinopathy of prematurity diagnosed?
Retinopathy of prematurity is diagnosed with a careful eye exam in babies who are born early or very small, usually after the pupils are widened with eye drops. An eye doctor looks at the back of the eye to check how the blood vessels are growing and whether there are signs of damage, bleeding, or pulling on the retina, which is the light-sensitive layer at the back of the eye. Doctors may also use special retinal photos to follow changes over time, because the condition is diagnosed by what is seen during these exams rather than by a blood or genetic test.
Stages of Retinopathy of prematurity
Retinopathy of prematurity has defined progression stages. It is graded by how much the blood vessels in the retina, the light-sensitive layer at the back of the eye, grow abnormally and whether they start to pull on the retina. Early and accurate diagnosis helps you plan ahead with confidence. Doctors track it with regular eye exams in premature babies, because early symptoms of retinopathy of prematurity are usually not something parents can see at home.
Stage 1
A faint line appears between the normal retina and the area that has not finished developing. This stage is mild, and many babies do not need treatment because it can improve on its own.
Stage 2
The line becomes a raised ridge, showing more noticeable abnormal vessel growth. Retinopathy of prematurity at this stage may still settle without treatment, but close follow-up is important.
Stage 3
Abnormal blood vessels start growing into the clear gel inside the eye instead of staying flat on the retina. This is more serious because the vessels can leak or form scar tissue, which raises the risk of later retinal damage.
Stage 4
Scar tissue begins to pull part of the retina away from the back of the eye, causing a partial retinal detachment. Treatment is often needed to help protect vision.
Stage 5
The retina is completely detached. This is the most advanced stage of retinopathy of prematurity and can cause severe vision loss or blindness.
Plus disease
The blood vessels in the back of the eye become unusually wide and twisted, which signals more active disease. When plus disease is present, retinopathy of prematurity is more likely to need urgent treatment.
Outlook and prognosis
The outlook for retinopathy of prematurity varies widely with severity: many mild cases stop progressing and can improve without treatment, while severe disease can lead to permanent retinal damage and vision loss if not recognized early. With timely screening and treatment, including laser therapy, anti-VEGF injections, or surgery when needed, many infants have a good chance of preserving useful vision. Even after successful treatment, children remain at higher risk for later eye problems such as myopia, strabismus, amblyopia, glaucoma, and retinal detachment, so long-term ophthalmic follow-up is important. Mortality is usually related not to the eye disease itself but to the extreme prematurity and associated medical complications seen in these infants. Overall, prognosis is best when high-risk premature babies receive careful neonatal care, regular eye examinations, and prompt treatment for progressive disease.
Long-term effects
Retinopathy of prematurity can have lasting effects on vision, but the outlook depends a lot on how severe it was and whether treatment was needed. Some children have only mild vision changes, while others develop eye problems that need care for years. Thinking about the long-term effects helps families understand why eye follow-up often continues well beyond infancy.
Some children living with retinopathy of prematurity have lower visual sharpness as they grow, even after the eye disease itself has settled. This can make faces, classroom boards, or small print harder to see clearly.
Retinopathy of prematurity often raises the chance of significant nearsightedness, and some children also develop astigmatism or farsightedness. Vision may seem fine at one age and then become more clearly affected once reading and distance tasks increase.
Squinting or eyes that do not line up well can happen more often after retinopathy of prematurity. Some children also develop a weak eye, which can reduce vision in one eye if the brain starts favoring the other.
In more severe cases, scar tissue can pull on the retina later in childhood or adulthood and lead to retinal detachment. This is one of the most serious long-term effects of retinopathy of prematurity because it can cause major vision loss.
How is it to live with Retinopathy of prematurity?
Living with retinopathy of prematurity can range from almost no day-to-day impact to major vision challenges, depending on how much the retina was affected and whether treatment was needed early. Many children with ROP do well but may need frequent eye visits, glasses, or help with low vision, while some living with more severe ROP can have lasting problems with seeing faces, reading, moving safely through new spaces, or doing school tasks without support. For families, this often means ongoing appointments, close attention to visual development, and adapting home, school, and routines so the child can navigate the world more confidently and independently.
Treatment and drugs
Retinopathy of prematurity is treated based on how far the eye changes have progressed, and many babies only need close follow-up exams because mild cases can improve as the eyes continue to develop. When treatment is needed, doctors usually aim to stop abnormal blood vessel growth in the retina, most often with laser treatment and, in some cases, injections of anti-VEGF drugs into the eye. Treatment often looks different for each person, because the best choice depends on the baby’s age, overall health, and how severe the retinopathy of prematurity is. Some infants with more advanced disease may need eye surgery if the retina starts to pull away, and even after treatment, regular eye checks are important because children treated for retinopathy of prematurity can still have later vision problems such as nearsightedness or squint. If you are wondering about the early symptoms of retinopathy of prematurity, it is worth knowing that parents usually do not notice them at home, which is why screening and follow-up matter so much.
Can you cure Retinopathy of prematurity?
There is no true cure for retinopathy of prematurity once it has caused lasting damage, although mild cases often get better on their own as a baby grows. Treatments like laser treatment, medicine given into the eye, or surgery can help stop the disease from getting worse and lower the risk of serious vision loss. Even with treatment, some children may still have vision problems later and need regular eye care.
Non-drug treatment
Retinopathy of prematurity can affect babies born very early, and care often centers on protecting vision while the eyes are still developing. Some infants only need close eye checks, while others need procedures to stop abnormal blood vessels from pulling on the retina. Some non-drug options are delivered by specialists, and the right treatment for retinopathy of prematurity depends on how severe it is. Many living with retinopathy of prematurity also need follow-up as they grow, because later vision problems can still happen.
Mild retinopathy of prematurity often improves on its own, so careful follow-up eye exams may be the main step at first. These visits help the eye team spot changes quickly and decide if treatment is needed.
Laser therapy can seal the outer areas of the retina that are driving abnormal blood vessel growth. This can lower the risk of scarring and retinal detachment, especially when early treatment for retinopathy of prematurity is needed.
Cryotherapy uses controlled freezing on the outside of the eye to treat parts of the retina and may be used when laser is not suitable. It is less common today, but it can still help in selected cases.
If the retina starts to detach, surgery such as vitrectomy or a scleral buckle may be considered to support or reattach it. These operations are usually reserved for advanced disease and aim to preserve as much vision as possible.
Your genes may have an impact on how drugs work for you
For babies with retinopathy of prematurity, inherited differences in how the body grows and repairs blood vessels may help explain why some respond better than others to certain eye treatments, especially medicines that slow abnormal blood vessel growth. This area of research is still developing, though, and there is not yet a well-established genetic test that doctors routinely use to choose medicines for retinopathy of prematurity. In day-to-day care, treatment decisions are still based much more on how the baby’s eyes look, how early they were born, and how severe the disease is.
Pharmacological treatments
In retinopathy of prematurity, medicines are not the main option for every baby, but some infants are treated with anti-VEGF eye injections when the abnormal blood vessels are growing in a risky way. These medicines are placed directly into the eye by a specialist, usually in the neonatal intensive care unit or operating room, and they may be used instead of laser treatment or after it. Not everyone responds to the same medication in the same way, so the best treatment for retinopathy of prematurity depends on how severe the eye changes are and where they are located.
Bevacizumab is an anti-VEGF drug that can slow the abnormal blood vessel growth seen in retinopathy of prematurity. It is often considered for severe disease, especially when the changes are very far back in the eye. Babies who receive it need close follow-up because retinopathy of prematurity can come back weeks or months later.
Ranibizumab is another anti-VEGF injection used to treat retinopathy of prematurity in some centers. It acts in a similar way but may leave the bloodstream sooner than bevacizumab, which is one reason some specialists prefer it. Careful repeat eye exams are still needed after treatment.
Aflibercept is a newer anti-VEGF option that may be used for some babies with retinopathy of prematurity. It can be helpful in selected cases, but doctors still monitor closely for recurrence and for how the retina continues to develop. If one option isn’t effective, second-line or alternative drugs may be offered.
Genetic influences
Retinopathy of prematurity usually develops because a baby is born very early, when the blood vessels in the retina are still forming and can be affected by oxygen levels and overall illness. Genetics is only one piece of the puzzle, but inherited differences in how the body controls blood vessel growth, inflammation, and healing may help explain why one premature baby develops more severe retinopathy of prematurity than another with a similar start in life. Researchers have linked this risk to several genes involved in retinal vessel development, although no single gene explains most cases. For many families, this means genes may shape susceptibility rather than directly cause the condition on their own. Genetic testing is not routine for most infants with retinopathy of prematurity, but it may be considered if the eye findings are unusual or there is concern for a rare inherited eye disorder that can look similar. When doctors talk about the main risk factors for retinopathy of prematurity, they still focus first on prematurity, very low birth weight, and the baby’s medical course after birth.
Is Retinopathy of prematurity genetic?
Genetics may slightly affect who develops retinopathy of prematurity and how severe it becomes, but they are not the main cause. In most cases, prematurity and oxygen-related factors matter more than inherited genetic variations.
Having a genetic risk is not necessarily a diagnosis
Changes in genes are a normal part of being human and are common throughout the population. Most of these changes do not directly affect health and are simply part of natural human diversity. For many genes, carrying a change connected with a condition suggests a possible link rather than a certain diagnosis, especially when several genes and environmental factors are involved. In some cases, however, a single well-studied change in a specific gene is enough to confirm a diagnosis.
Pharmacogenetics—how genetics influence drug effects
For babies living with retinopathy of prematurity, treatment choices are usually based on the eye exam, how early the baby was born, and overall health, not on a routine genetic test. Researchers do think that genes may partly affect who develops more severe retinopathy of prematurity and how the retina responds to the stress of early birth and changing oxygen levels. Genetics is only one factor, and doctors still rely mainly on careful screening exams to decide whether laser treatment or medicines that slow abnormal blood vessel growth, called anti-VEGF drugs, are needed. Right now, there is no standard pharmacogenetic test used in everyday care to pick the best drug or dose for retinopathy of prematurity. In some families, genetic testing may be considered if the eye findings are unusual or if the care team suspects another inherited eye disorder that can look similar. As research moves forward, understanding how genetics affect treatment for retinopathy of prematurity may help make care more personalized.
Interactions with other conditions
Children and adults living with retinopathy of prematurity may also have other eye or developmental issues that affect daily life, such as trouble tracking objects, bumping into things, or needing stronger vision support at school. Retinopathy of prematurity is especially important to view in the wider context of prematurity, because babies born very early often have lung disease, brain injury, hearing problems, or delayed development alongside their eye condition. Doctors call it a comorbidity when two conditions occur together. For example, a child with cerebral palsy or developmental delay may find it harder to use the vision they have effectively, even if the eye disease itself is stable. Retinopathy of prematurity can also occur with severe nearsightedness, strabismus, glaucoma, or later retinal detachment, so follow-up eye care often continues well beyond infancy. Because many of these conditions can overlap in how they affect learning, movement, and communication, care is often best coordinated between eye doctors, pediatricians, and developmental specialists.
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 Retinopathy of prematurity?
Other eye problems in babies can sometimes look like retinopathy of prematurity, especially familial exudative vitreoretinopathy, an inherited condition that also affects blood vessel growth at the back of the eye, and persistent fetal vasculature, where tissue inside the eye does not shrink away before birth as it normally should. More rarely, retinoblastoma, a cancer of the eye, or Coats disease, which causes leaky blood vessels in the eye, can cause similar signs such as poor vision, a white-looking pupil, or the light-sensing layer at the back of the eye pulling away. Doctors tell these apart by looking at how early the baby was born, whether similar eye problems run in the family, and what the eye exam shows.
History
When very premature babies began surviving more often in the 1940s and 1950s, doctors also started noticing a troubling eye problem that could leave some infants with severe vision loss. At first, this condition was described under a different name, because the changes seen in the back of the eye were not yet fully understood. What families experienced could be heartbreaking: a baby who seemed to be doing well in the neonatal unit might later be found to have serious damage affecting sight. This condition is now known as retinopathy of prematurity.
Early on, many specialists believed extra oxygen was the main reason retinopathy of prematurity developed. That idea came from an important clue: rates of blindness fell when oxygen use was more carefully controlled in premature infants. But the story turned out to be more complicated. Babies born very early often need oxygen to survive, so the challenge was never simply to stop it, but to use it as safely as possible while also protecting the eyes, brain, and lungs.
As newborn care improved over the following decades, understanding of retinopathy of prematurity became much more precise. In recent decades, awareness has grown that the condition is linked not only to oxygen exposure, but also to how early a baby is born, how low their birth weight is, and how the developing blood vessels in the retina respond after premature birth. Researchers also learned that different stages of disease carry different levels of risk, which helped doctors decide which babies needed close monitoring and which needed treatment.
This history changed day-to-day care in a very practical way. Eye screening programs were developed so babies at risk could be checked at the right time, often while still in the hospital. Treatments also evolved, moving from older methods that aimed to protect the retina from further damage to newer options that can help in selected cases, though long-term follow-up remains important because some children still go on to have vision problems, nearsightedness, or retinal complications later in life.
Today, the history of retinopathy of prematurity is closely tied to advances in neonatal care. More very premature babies now survive than in the past, which means careful screening is still essential. Looking back at the treatment of retinopathy of prematurity helps explain why modern care focuses on both survival and quality of life, with neonatologists, eye specialists, and families working together from the earliest days.