β-Blocking and racial variation in the severity of retinopathy of prematurity.

Research Letter: In the Early Treatment for Retinopathy of Prematurity Study, the incidence of retinopathy of prematurity (ROP) was the same among African American and non–African American infants; however, once ROP was observed, the incidence of progression to severe (prethreshold) ROP occurred more commonly among non–African American infants. Herein, we expand on these findings and present a possible cause and research approach focused on prevention of some cases of severe ROP.