When a baby arrives earlier than expected, many organs are still developing, including the eyes. One important condition that neonatal teams watch closely for is retinopathy of prematurity (ROP), an eye disease that can affect how a child sees for the rest of life.
This guide is written for parents and caregivers of premature infants. It explains, in clear language, what ROP is, why it matters, how it is found and treated, and what to expect as your child grows.
What Is Retinopathy of Prematurity?
Retinopathy of prematurity is an eye condition that happens when the blood vessels in the retina (the light-sensitive layer at the back of the eye) grow in an abnormal way in premature babies.
These abnormal vessels can:
- Be fragile and leak or bleed
- Create scar tissue on the retina
- Pull on the retina, sometimes causing it to detach from the back of the eye, which can lead to serious vision loss or blindness
ROP can range from very mild, which often heals on its own, to severe forms that require urgent treatment to protect your baby’s sight.
Why Premature Babies Are at Risk
In pregnancy, the retina’s blood vessels usually finish developing near the end of the third trimester. When a baby is born early, this normal growth pattern is interrupted.
Doctors have identified babies at the highest risk for ROP as those who:
- Are born before about 31 weeks of pregnancy
- Weigh less than about 1500 grams (3–3.3 pounds) at birth
Other factors in the neonatal intensive care unit (NICU) can also influence risk, including how sick the baby is overall, breathing problems, infections, and how much oxygen support is needed.
How the Retina Normally Develops
Understanding normal development can help explain why prematurity plays such a big role.
- Blood vessel growth in the retina begins around the middle of pregnancy.
- Vessels slowly spread outward from the center of the retina toward the edges.
- This process typically finishes only shortly before or after full-term birth.
When birth occurs too early, blood vessels have not yet reached the edges of the retina. After birth, under changed conditions (such as different oxygen levels), these vessels may grow in an abnormal way, leading to ROP.
How Common and How Serious Is ROP?
ROP does not affect every premature infant, but it is one of the leading causes of preventable childhood blindness worldwide.
Key points for parents:
- Most premature babies who develop ROP have mild disease that improves on its own as blood vessels mature.
- A smaller group develops moderate or severe ROP that may threaten vision and require treatment.
- Early detection and timely treatment can dramatically reduce the risk of blindness.
How Doctors Describe ROP: Zones and Stages
During eye exams, the pediatric ophthalmologist classifies ROP using a combination of zones (location), stages (severity), and other features. This information helps guide whether treatment is needed.
| Term | What It Refers To | What It Means for Parents |
|---|---|---|
| Zones | How far blood vessels have grown from the center of the retina toward the edges. | Zones closer to the center are often more serious if affected. |
| Stages 1–5 | The degree of abnormal blood vessel growth and retinal damage. | Low stages (1–2) are usually mild; higher stages (3–5) are more severe and more likely to need treatment. |
| Plus disease | Very active, swollen blood vessels that signal a more aggressive form of ROP. | Often prompts doctors to recommend treatment sooner. |
Your baby’s eye doctor will usually tell you both the zone and stage, and whether there is any sign of plus disease. Together, this helps predict the chance of progression and guides how often follow-up exams are needed.
Signs and Symptoms: What Parents Can and Cannot See
In the early stages, ROP causes no visible symptoms. Babies do not show obvious discomfort from the condition, and parents cannot see changes in the eye from the outside.
This is why organized screening programs are essential in the NICU.
Possible Signs in Later or Untreated Disease
If ROP has caused significant damage, parents or caregivers might notice, as the child grows older:
- Eyes that do not track or follow objects well
- Eyes that wander, shake, or seem misaligned
- White-looking pupils instead of black
- Difficulty recognizing faces or objects
These changes can be linked to advanced ROP or to other eye conditions that premature babies are more likely to have, such as nearsightedness, lazy eye, or crossed eyes.
How and When Screening Takes Place
Because early ROP is silent, hospitals use strict guidelines for eye screening in premature infants. A pediatric ophthalmologist (eye doctor for children) usually performs the exam.
Which Babies Are Screened?
While exact criteria can vary slightly by country or hospital, common guidelines recommend screening babies who:
- Weigh less than about 1500 grams (3–3.3 pounds) at birth
- Are born before about 31 weeks of pregnancy
Some slightly bigger or older babies may also be checked if they have serious medical problems that put them at higher risk.
What Happens During the Exam?
The eye exam can look intense, but it is quick and very important. Generally, the steps include:
- Eye drops are placed in your baby’s eyes to dilate (widen) the pupils.
- The doctor uses a bright light and special lenses or instruments to view the retina.
- The exam is often done at the bedside in the NICU.
Babies may fuss or cry, but the team uses comfort measures, such as swaddling, pacifiers, or sugar water. The goal is to keep the baby as calm and safe as possible during the exam.
How Often Are Exams Repeated?
ROP can change quickly, especially in small infants, so repeat exams are scheduled based on what the doctor sees. Follow-up usually continues until:
- Blood vessels have fully grown to the edges of the retina, or
- ROP has clearly improved and is no longer at risk of progressing.
Many babies continue their eye checks after discharge from the NICU, often every one to two weeks until the ophthalmologist is confident the risk of severe ROP has passed.
Treatment Options for ROP
Many babies have mild ROP that gets better as the eye matures and never need treatment. When ROP becomes more advanced, early treatment can lower the chance of retinal detachment and permanent vision loss.
Observation Only
If the eye doctor sees only mild changes, they will usually:
- Recommend close monitoring with regular eye exams
- Explain the current zone and stage to you
- Adjust the exam schedule if the condition appears to be getting better or worse
Most mild cases gradually improve as normal retinal vessels reach the outer edges of the retina.
Laser Therapy
Laser treatment has been a standard therapy for many years for more advanced ROP.
- Small laser spots are applied to areas of the retina that do not yet have normal blood vessels.
- This reduces the retina’s oxygen demand and slows or stops abnormal vessel growth.
- The procedure is usually done in the operating room or a special procedure area, sometimes under general anesthesia.
Laser therapy can save central vision but may reduce some peripheral (side) vision because it treats the outer parts of the retina.
Medication Injections
In recent years, doctors have also used medications injected directly into the eye to treat certain forms of ROP.
- These medicines block specific signals that drive abnormal vessel growth.
- They may be used alone or with laser treatment, depending on the pattern of ROP.
- After injections, babies usually need longer-term follow-up to be sure the disease does not return.
Research is ongoing to better understand long-term outcomes and to determine which babies benefit most from this approach.
Surgery for Retinal Detachment
In rare, severe cases where the retina has started to detach or is fully detached, more complex surgery may be considered.
- Procedures aim to reattach the retina or relieve the pulling forces caused by scar tissue.
- Even with surgery, some babies may have limited vision, but early intervention gives the best chance of preserving sight.
Life After ROP: Long-Term Eye Health
Whether or not your baby needed treatment, being born prematurely increases the risk of later eye and vision problems.
Possible Long-Term Issues
Children who had ROP, or who were very premature, are more likely than full-term children to develop:
- Nearsightedness (myopia)
- Strabismus (eyes that are not straight)
- Amblyopia (“lazy eye,” where one eye sees better than the other)
- Later-onset retinal problems, especially in those with severe ROP history
Because of this, eye specialists usually recommend regular eye exams throughout childhood for children born very early or with a history of ROP.
How Parents Can Support Healthy Vision
As your baby grows, you can help protect their sight by:
- Keeping up with all recommended ophthalmology appointments
- Watching for signs that your child struggles to see (sitting very close to screens, squinting, or bumping into objects)
- Talking with your pediatrician if you notice eye crossing, drifting, or unusual eye movements
- Ensuring your child wears glasses or eye patches as prescribed
Emotional Support for Families
Having a baby in the NICU is emotionally overwhelming. Learning that your child might have an eye disease can add to that stress. Many parents feel fear, guilt, or confusion.
Helpful steps include:
- Asking questions during rounds or eye exams until you feel you understand your baby’s condition
- Requesting written summaries of your baby’s ROP zone, stage, and next appointment date
- Connecting with social workers, psychologists, or parent support groups in the NICU
- Remembering that early detection and modern treatments have greatly improved outcomes for many babies with ROP
Frequently Asked Questions (FAQs)
Is ROP caused by something I did during pregnancy?
No. ROP is closely linked to how early and how small a baby is at birth, as well as medical complications that require intensive care. Parents do not cause ROP by anything they did or did not do.
Can ROP be completely prevented?
Doctors work hard to prevent severe ROP by carefully managing oxygen levels and overall health in the NICU, and by screening and treating early. But because the key risk factor is prematurity itself, ROP cannot always be prevented.
Will my baby need eye exams after leaving the NICU?
Most premature infants do. If the retina is still maturing or if your baby had ROP, follow-up visits with a pediatric ophthalmologist are essential until the doctor confirms that eye development is stable.
If my baby needed laser or injection treatment, does that mean they will be blind?
Not necessarily. Many babies treated for ROP go on to have useful vision, especially when treatment is done early. Some may have limited peripheral vision or need glasses, but timely therapy greatly reduces the risk of complete blindness.
How can I keep track of all the appointments and information?
Many parents use a small notebook or notes app to record each eye exam date, the stage and zone of ROP, and the next follow-up. You can also ask the care team to write this down for you at each visit.
References
- Retinopathy of Prematurity (ROP) — Akron Children’s Hospital / KidsHealth. 2023-05-15. https://www.akronchildrens.org/kidshealth/en/parents/rop.html
- Retinopathy of Prematurity — National Eye Institute, National Institutes of Health. 2023-09-14. https://www.nei.nih.gov/learn-about-eye-health/eye-conditions-and-diseases/retinopathy-prematurity
- Retinopathy of Prematurity (ROP) — Nationwide Children’s Hospital. 2022-08-01. https://www.nationwidechildrens.org/conditions/retinopathy-of-prematurity
- Retinopathy of Prematurity — Children’s Hospital Colorado. 2022-11-10. https://www.childrenscolorado.org/conditions-and-advice/conditions-and-symptoms/conditions/retinopathy-of-prematurity/
- Retinopathy of Prematurity: Causes & Treatment Options — Cleveland Clinic. 2023-01-20. https://my.clevelandclinic.org/health/diseases/17430-retinopathy-of-prematurity
- Retinopathy of Prematurity (ROP) — University of Michigan Health. 2021-06-30. https://www.uofmhealth.org/our-care/specialties-services/retinopathy-prematurity-rop
