The preterm infant is subjected to prolonged exposure to ambient nursery illumination at levels that have been found to produce retinal damage in animals. We prospectively investigated the effect of exposure to light in two intensive care nurseries by comparing the incidence of retinopathy of prematurity among 74 infants from the standard bright nursery environment (median light level, 60 foot-candles [ftc]) with the incidence among 154 infants of similar birth weight for whom the light levels were reduced (median, 25 ftc). There was a higher incidence of retinopathy of prematurity in the group of infants who had been exposed to the brighter nursery lights, particularly in those with birth weights below 1000 g (86 percent vs. 54 per cent, P less than 0.01 by chi-square test). We conclude that the high level of ambient illumination commonly found in the hospital nursery may be one factor contributing to retinopathy of prematurity and that safety standards with regard to current lighting practices should be reassessed.

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Twenty infants with intractable diarrhea, whose onset was before 3 months of age, were analyzed. Twelve had identifiable pathological entities sufficient to explain their protracted diarrhea. A systematic diagnostic scheme for such babies is presented. Eight of the 20 infants had no identifiable cause for diarrhea of such severity and refractoriness, and these babies were termed non-specific enterocolitis. Six of these latter eight babies died and at autopsy had widespread enterocolitis with destruction of the mucosa and inflammatory infiltration. The authors believe that in these latter cases, regardless of the initial cause of the diarrhea, certain vicious cycles came into play which perpetuated the diarrhea. Preliminary evidence suggests that colostomy and, perhaps adrenal corticosteroids, may be useful in the therapy of refractory enterocolitis, particularly if applied before the terminal stages of the disease.

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