Long-term effect of phototherapy on visual function.

Computer-averaged electroretinogram records were used to examine scotopic retinal functioning of a group of 4-year-old children who were treated for neonatal hyperbilirubinemia by exposure to at least 42 consecutive hours of continuous phototherapy. Dark adaptation functions of the children were similar to those previously found for control subjects, suggesting that no permanent damage to rod function had been incurred during exposure. Statistical analysis showed no significant differences in the final electroretinographic amplitudes of light-treated and control subjects. Ophthalmologic and neurologic examinations were also negative.