Retrolental fibroplasia is now recognized as which form of another retinal disease?

The most advanced form of retinopathy of prematurity The historical term retrolental fibroplasia describes what is now classified as end-stage retinopathy of prematurity, with fibrovascular tissue behind the lens.

The earliest stage of familial exudative vitreoretinopathy

An early form of persistent fetal vasculature

A mild variant of Coats disease

Which exposure was historically responsible for retrolental fibroplasia in premature infants?

Intravenous antibiotics given for neonatal sepsis

Phototherapy used for neonatal jaundice

Maternal corticosteroids given before delivery

How does high oxygen exposure initiate retrolental fibroplasia in the immature retina?

It suppresses VEGF, causing vaso-obliteration of immature vessels High oxygen levels suppress vascular endothelial growth factor, obliterating the immature retinal vessels of an incompletely vascularised retina.

It thickens Bruch membrane and blocks choroidal perfusion

It causes direct photoreceptor toxicity at the macula

It triggers immediate fibroblast migration into the vitreous

What follows withdrawal of supplemental oxygen in retrolental fibroplasia?

Relative hypoxia stimulating excessive VEGF production Once oxygen is withdrawn the relatively hypoxic retina overproduces VEGF, driving pathologic neovascularization, fibrovascular proliferation and vitreoretinal traction.

Rapid spontaneous vascularization of the peripheral retina

Permanent suppression of retinal angiogenic signalling

Immediate resolution of the peripheral avascular zone

Which finding lies at the junction of vascular and avascular retina in retrolental fibroplasia?

Ridge formation A ridge at the vascular-avascular junction is a hallmark of the disease, seen alongside a peripheral avascular retina on indirect ophthalmoscopy.

Which presentation should raise suspicion of advanced retrolental fibroplasia in an infant?

Leukocoria with poor visual fixation Advanced disease presents with leukocoria, an absent red reflex and poor fixation; early stages are asymptomatic, which is why screening matters.

Painful red eye with photophobia

Corneal clouding with buphthalmos

Which condition is a recognised mimic of retrolental fibroplasia?

Persistent fetal vasculature Persistent fetal vasculature, congenital cataract, retinoblastoma and Coats disease all mimic the picture, so birth history and careful examination are needed.

Central serous chorioretinopathy

How are the retinal findings of advanced retrolental fibroplasia formally categorised?

By the international ROP classification of stage and zone Diagnosis rests on gestational and birth history plus retinal findings staged and zoned according to the international ROP classification.

By axial length measured on A-scan

By electroretinogram amplitude thresholds

Which intervention is used for advanced tractional detachment in retrolental fibroplasia?

Vitreoretinal surgery Laser ablation and anti-VEGF treat earlier disease, while vitreoretinal surgery is reserved for advanced tractional detachments; early intervention improves outcomes.

Scleral buckling with cryotherapy alone

Intravitreal antibiotic injection

Retrolental Fibroplasia: Historical Disease With Modern Lessons

Case Study

A male infant born at 27 weeks of gestation with a birth weight of 900 grams was admitted to the neonatal intensive care unit for respiratory distress syndrome.

Prolonged supplemental oxygen therapy was required during the first weeks of life. At 3 months of corrected age, ophthalmic screening revealed leukocoria and poor fixation in both eyes.

Fundus examination showed dense fibrovascular tissue behind the lens with tractional retinal detachment. A diagnosis of retrolental fibroplasia was made.

Disease Entity

Retrolental fibroplasia (RLF) is a historical term describing a severe, blinding retinal disorder observed in premature infants exposed to high concentrations of supplemental oxygen.

The disease is now recognized as the most advanced form of retinopathy of prematurity (ROP).

Although classic RLF is rare in modern practice, its historical significance has shaped neonatal care and ophthalmic screening protocols worldwide.

The condition is characterized by abnormal retinal vascular development leading to fibrovascular proliferation, tractional retinal detachment, and the formation of a fibrous membrane posterior to the crystalline lens.

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Historical Perspective

RLF emerged as a major cause of childhood blindness in the 1940s and 1950s, coinciding with widespread, unregulated use of high-flow oxygen in neonatal care.

The link between oxygen exposure and retinal vascular damage was later established, leading to dramatic changes in neonatal oxygen management.

These discoveries marked one of the earliest examples of iatrogenic disease prevention through evidence-based practice.

Pathophysiology

Normal retinal vascularization proceeds from the optic disc toward the periphery during late gestation. In premature infants, this process is incomplete at birth.

Exposure to high oxygen levels suppresses vascular endothelial growth factor (VEGF), causing vaso-obliteration of immature retinal vessels.

Subsequent relative hypoxia after oxygen withdrawal stimulates excessive VEGF production, leading to:

Pathologic neovascularization
Fibrovascular proliferation
Vitreoretinal traction
Retinal detachment

In advanced stages, this fibrovascular tissue contracts, pulling the retina anteriorly and forming a dense retrolental membrane.

Epidemiology

Classic retrolental fibroplasia is now rare in developed healthcare systems due to improved neonatal practices.

However, severe ROP remains a significant concern worldwide, particularly in regions with limited access to controlled oxygen delivery and systematic screening programs.

Risk factors include:

Extreme prematurity
Low birth weight
Prolonged or unmonitored oxygen therapy
Systemic illness and sepsis

Clinical Features

Infants with advanced disease may present with:

Leukocoria
Absent or poor red reflex
Poor visual fixation
Nystagmus
Microphthalmia in chronic cases

Early stages are typically asymptomatic, highlighting the importance of routine screening.

Examination Findings

Ophthalmic examination may reveal:

Peripheral avascular retina
Ridge formation at the junction of vascular and avascular retina
Neovascularization and fibrovascular proliferation
Tractional or total retinal detachment
Fibrous retrolental membrane in end-stage disease

Indirect ophthalmoscopy and wide-field retinal imaging are essential for accurate assessment.

Differential Diagnosis

Conditions that may mimic retrolental fibroplasia include:

Persistent fetal vasculature
Congenital cataract
Retinoblastoma
Coats disease

Careful history and examination are required to differentiate these entities.

Diagnosis

Diagnosis is based on:

Gestational age and birth history
Retinal findings consistent with advanced ROP
Staging and zoning according to the international ROP classification

Ancillary imaging may assist in documentation and follow-up.

Management

Prevention

Strict regulation of oxygen therapy
Continuous oxygen saturation monitoring
Universal ROP screening programs

Treatment

Peripheral retinal ablation using laser photocoagulation
Intravitreal anti-VEGF therapy in selected cases
Vitreoretinal surgery for advanced tractional detachments

Early intervention significantly improves outcomes.

Prognosis

Visual prognosis depends on disease severity and timing of intervention. Advanced RLF carries a poor prognosis, with many patients developing profound visual impairment.

Modern preventive strategies have dramatically reduced the incidence of blinding disease.

References

Terry TL. Extreme prematurity and fibroblastic overgrowth of persistent vascular sheath behind each crystalline lens. Am J Ophthalmol.
Gilbert C, Foster A. Childhood blindness in the context of VISION 2020. Bull World Health Organ.
American Academy of Ophthalmology. Basic and Clinical Science Course: Retina and Vitreous.
Good WV. Retinopathy of prematurity: past, present, and future. Arch Ophthalmol.
Smith LEH. Pathogenesis of retinopathy of prematurity. Semin Neonatol.

Test yourself

A few questions straight from this article.

1 / 10 0 correct

Retrolental fibroplasia is now recognized as which form of another retinal disease?
The historical term retrolental fibroplasia describes what is now classified as end-stage retinopathy of prematurity, with fibrovascular tissue behind the lens.
Which exposure was historically responsible for retrolental fibroplasia in premature infants?
The disease was seen in premature infants exposed to high concentrations of supplemental oxygen, and the link between oxygen and retinal vascular damage reshaped neonatal care.
How does high oxygen exposure initiate retrolental fibroplasia in the immature retina?
High oxygen levels suppress vascular endothelial growth factor, obliterating the immature retinal vessels of an incompletely vascularised retina.
What follows withdrawal of supplemental oxygen in retrolental fibroplasia?
Once oxygen is withdrawn the relatively hypoxic retina overproduces VEGF, driving pathologic neovascularization, fibrovascular proliferation and vitreoretinal traction.
During which period did retrolental fibroplasia emerge as a major cause of childhood blindness?
The epidemic coincided with widespread unregulated use of high-flow oxygen in neonatal units during the 1940s and 1950s.
Which finding lies at the junction of vascular and avascular retina in retrolental fibroplasia?
A ridge at the vascular-avascular junction is a hallmark of the disease, seen alongside a peripheral avascular retina on indirect ophthalmoscopy.
Which presentation should raise suspicion of advanced retrolental fibroplasia in an infant?
Advanced disease presents with leukocoria, an absent red reflex and poor fixation; early stages are asymptomatic, which is why screening matters.
Which condition is a recognised mimic of retrolental fibroplasia?
Persistent fetal vasculature, congenital cataract, retinoblastoma and Coats disease all mimic the picture, so birth history and careful examination are needed.
How are the retinal findings of advanced retrolental fibroplasia formally categorised?
Diagnosis rests on gestational and birth history plus retinal findings staged and zoned according to the international ROP classification.
Which intervention is used for advanced tractional detachment in retrolental fibroplasia?
Laser ablation and anti-VEGF treat earlier disease, while vitreoretinal surgery is reserved for advanced tractional detachments; early intervention improves outcomes.