2. Screening Visual Brainstem Responses after TEA (at 50-54 wks PMA): All infants in this subcohort will be evaluated using the sVEP technique described above.68 Electrodes are placed across the back of the visual cortex, midline and 2 cm to the left and right, with a reference lead at the occipital vertex. Thresholds and suprathreshold measurements will be compared with controls. Further, the infants in the bilirubin cohort can serve a case series with a dose response plot determined, comparing thresholds with TB levels. Bin averages for each type of vision can also be compared to the same for control infants to determine whether suprathreshold measures vary to any significant degree from controls (Fig. 3).