Understanding Retinopathy of Prematurity (ROP): Symptoms, Causes and Care

Written by Medicover Team and Medically Reviewed by Dr K Sindhura , Pediatricians

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1. Causes 2. Find a Doctor 3. Diagnosis 4. Treatment 5. FAQs

Retinopathy of Prematurity (ROP) is an eye condition that affects some infants born prematurely, especially those born before 31 weeks. In ROP, abnormal blood vessels form in the baby's retina.

The retina is the layer of tissue at the back of the eye that converts light into electrical signals, which travel to the brain. The brain processes these signals and creates the images we see.

In most cases, the abnormal blood vessels in ROP don't cause harm and don't need special treatment other than regular monitoring. Up to 90% of babies with ROP improve without treatment and develop normal vision. However, in some cases, the condition can worsen and threaten the baby's vision.

In these situations, timely treatment is needed to prevent permanent damage to the retina and vision loss. Without proper treatment, advanced ROP can lead to blindness.

Healthcare providers recommend screenings for at-risk babies to detect ROP early and identify when treatment is needed. Following the screening schedule is crucial to reduce the risk of vision problems.

What Are the Stages of Retinopathy of Prematurity (ROP)?

ROP is classified into five stages based on the severity of the disease and the progression of abnormal blood vessel growth. These stages help doctors determine the appropriate course of action for treatment:

Stage 1: Mild ROP - The blood vessels in the retina have abnormal growth, but the disease is not yet threatening vision. This stage often resolves on its own without treatment.
Stage 2: Moderate ROP - Abnormal blood vessel growth continues, and the condition may require close monitoring. In many cases, no intervention is needed, but regular check-ups are essential.
Stage 3: Severe ROP - At this stage, abnormal blood vessels grow and can cause the retina to become detached. Treatment may be necessary to prevent vision loss.
Stage 4: Advanced ROP - The retina becomes partially detached, and there is a significant risk of vision impairment. Surgical intervention is usually required to reattach the retina.
Stage 5: End-stage ROP - Complete retinal detachment occurs, often resulting in permanent blindness. Surgery may still be attempted, but the chances of restoring vision are minimal.

What Are the Symptoms of Retinopathy of Prematurity?

ROP often doesn't show any visible symptoms in the early stages, so regular eye screenings are very important for premature babies. As the condition progresses, signs may include:

Poor eye tracking or movement
White pupils (leukocoria)
Abnormal eye movements or misalignment

What Causes Retinopathy of Prematurity?

The exact cause of ROP is multifactorial, involving genetic and environmental factors. However, the primary risk factor is prematurity, with smaller, more premature infants at higher risk. Other contributing factors include:

High Oxygen Therapy: Excessive oxygen levels can disrupt normal retinal vascular development.
Low Birth Weight: Infants weighing less than 1500 grams are particularly susceptible.
Infections and Inflammation: Neonatal sepsis and other diseases can exacerbate the condition.
Genetic Predisposition: Family history may play a role in the development of ROP.

When to See a Doctor for Retinopathy of Prematurity

Medical evaluation is important for premature babies at risk of ROP because early stages may not cause visible symptoms. A paediatrician or retina specialist can examine the retina, monitor abnormal blood vessel growth, and provide timely treatment to protect the baby's vision.

You should see a doctor if you have:

A baby born prematurely or with a low birth weight who needs ROP screening
A baby who misses a scheduled ROP eye examination or follow-up visit
Concerns about poor eye tracking, abnormal eye movements, or eye misalignment

Get medical help immediately if:

A white pupil or unusual white reflection is noticed in the baby's eye
The baby develops sudden or severe changes in eye movement or visual response
A diagnosed case of ROP shows signs of worsening or retinal detachment

These could be signs of serious ROP complications like retinal detachment, which needs urgent care.

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How Is Retinopathy of Prematurity Diagnosed and Screened?

Routine screening is the most effective way to diagnose ROP early, especially in babies born prematurely. An eye specialist (ophthalmologist) uses specialized equipment to examine the retina and monitor blood vessel development. Early detection is vital, as it allows for timely intervention to prevent vision loss.

How Is Retinopathy of Prematurity Treated?

The depth of retinal damage and the severity of ROP determine the course of treatment. Typical approaches to treatment include:

Laser therapy: In severe cases of ROP, laser treatment may be used to stop the abnormal blood vessels from growing.
Cryotherapy: Cold treatment may be used to reduce abnormal blood vessels.
Surgical intervention: In advanced cases, surgery may be required to detach the retina or correct other vision problems.
Anti-VEGF medication: In certain situations, medications that block the growth of abnormal blood vessels may be prescribed.

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What Are the Risk Factors for Retinopathy of Prematurity?

Premature birth: Born before 31 weeks of gestation
Low birth weight: Under 1500 grams or 3.3 lbs
Exposure to high levels of oxygen: During neonatal care
Infections or illness: During pregnancy or after birth
Multiple pregnancies: Twins, triplets, etc.
Poor neonatal care: Or complications during delivery
Unstable medical conditions: In the newborn, such as respiratory issues or heart problems
Family history of ROP: Although it's rare, some genetic factors may contribute

How Can Retinopathy of Prematurity Be Prevented?

While ROP cannot always be prevented, ensuring premature infants receive the appropriate care can reduce the risk.

Monitoring oxygen levels in premature babies to prevent excessive oxygen exposure.
Providing proper neonatal care to reduce the risk of infections and other complications.

What Are the Long-Term Outcomes of Retinopathy of Prematurity?

The long-term outcomes for babies with ROP vary based on the severity of the condition and how effective the treatment is. While many babies recover with minimal vision loss, some may face complications such as:

Myopia (Nearsightedness)
Strabismus (Crossed Eyes)
Amblyopia (Lazy Eye)
Glaucoma
Retinal Detachment

Regular follow-up with an ophthalmologist is crucial to monitor complications and ensure timely treatment if needed.

Retinopathy of Prematurity is a serious condition that needs early detection and treatment to prevent blindness or long-term vision problems. Regular eye screening, timely treatment, and proper care are key to managing this condition and safeguarding the vision of premature babies.

Frequently Asked Questions

1. Is ROP treatable in infants who are diagnosed at an early stage?

Yes, early detection of ROP is crucial for effective treatment. In mild cases, it may resolve without treatment. For more severe cases, treatments like laser therapy, cryotherapy, or anti-VEGF medications can help prevent vision loss.

2. How often should premature babies be screened for ROP?

Premature babies, especially those born before 31 weeks or weighing less than 1500 grams, should be screened for ROP starting at around 4 to 6 weeks after birth. The frequency of screening may vary depending on the baby's condition and risk factors.

3. Can ROP occur in full-term babies?

ROP is very rare in full-term babies. It primarily affects premature infants born before 31 weeks of gestation. Full-term babies usually have fully developed retinas, reducing the likelihood of developing this condition.

4. Can ROP develop in both eyes of a premature infant?

Yes, ROP can develop in both eyes of a premature infant. While it may affect one eye more than the other, it is common for both eyes to be involved, and both should be monitored regularly.

5. How do doctors monitor the progress of ROP in babies during treatment?

Doctors monitor the progress of ROP by conducting regular eye exams, typically every 1-2 weeks, to track changes in the blood vessels. The ophthalmologist will also use imaging tests like retinal photography to assess the condition and adjust treatment plans as needed.