Retinopathy of prematurity (ROP) is a problem affecting the eyes of premature babies, especially those born at or before 28 weeks of pregnancy. As the immature retina continues to develop after premature birth, abnormal blood vessels can grow around its edges; in severe cases, the retina detaches from the eye.

The cause of ROP is poorly understood. Because too much or too little oxygen intake can worsen ROP, oxygen therapy for premature babies is carefully administered.

Retinopathy of prematurity can be mild and may heal on its own. Mild ROP may cause strabismus (misaligned eyes), nearsightedness, or both. In more severe cases, eye surgery is often necessary to prevent vision impairment or blindness.

Babies with ROP or who are at risk for ROP need to be checked frequently by an eye specialist (ophthalmologist). Many babies with ROP become nearsighted by age 2.