Recordings of cortical and retinal responses to a series of light flashes were obtained from 50 premature infants and a smaller number of newborns and older infants and children. Data revealed a gradual evolution of the cortical-evoked response with advancing age. The electroretinogram, recorded simultaneously, remained essentially unchanged.
Fogarty TP, Reuben RN. Light-Evoked Cortical and Retinal Responses in Premature Infants. Arch Ophthalmol. 1969;81(4):454-459. doi:10.1001/archopht.1969.00990010456002