Abstract
The number of infants blinded from retinopathy of prematurity in the United States in 1979 is estimated to be 546, based on birth-weight-specific published survival statistics and ROP incidence data. Approximately 2,100 infants will be affected by cicatricial disease annually. A simple formula is presented that permits estimation of incidence data based on other regional data. It is suggested that increased attention be focused on this old enemy in order to document its incidence worldwide and to learn more about its prevention and treatment.

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