Which statement best describes the risk of retinopathy of prematurity with respect to oxygen exposure?

Which statement best describes the risk of retinopathy of prematurity with respect to oxygen exposure?

• A. Retinopathy of prematurity develops more often with prolonged supplemental oxygen exposure.
• B. There is no association between oxygen exposure and ROP.
• C. ROP only occurs in term infants.
• D. ROP is prevented by avoiding all oxygen.

Answer: (B)

Oxygen levels in preterm infants directly influence how the retinal blood vessels develop. When a baby is exposed to high or prolonged supplemental oxygen, the retinal vessels can become constricted and abnormal growth is suppressed during a critical period. As oxygen support is reduced or fluctuates, areas of the retina may become relatively hypoxic, triggering excessive and fragile new vessel growth. This combination—initial suppression of normal vessel development followed by abnormal neovascularization—creates the risk pattern seen in retinopathy of prematurity. Therefore, longer or higher oxygen exposure increases the risk, and modern care focuses on carefully titrating oxygen to avoid hyperoxia while ensuring adequate tissue oxygenation. It’s not about avoiding all oxygen, and ROP can occur in preterm infants, not only term ones. The statement that there is no association with oxygen exposure isn’t correct.

Oxygen levels in preterm infants directly influence how the retinal blood vessels develop. When a baby is exposed to high or prolonged supplemental oxygen, the retinal vessels can become constricted and abnormal growth is suppressed during a critical period. As oxygen support is reduced or fluctuates, areas of the retina may become relatively hypoxic, triggering excessive and fragile new vessel growth. This combination—initial suppression of normal vessel development followed by abnormal neovascularization—creates the risk pattern seen in retinopathy of prematurity. Therefore, longer or higher oxygen exposure increases the risk, and modern care focuses on carefully titrating oxygen to avoid hyperoxia while ensuring adequate tissue oxygenation. It’s not about avoiding all oxygen, and ROP can occur in preterm infants, not only term ones. The statement that there is no association with oxygen exposure isn’t correct.