Five-year-old girl with redness and light sensitivity of the right eye of 2 days' duration. She denied any significant pain or decreased vision. She initially presented to an urgent care clinic, where application of polymyxin B/trimethoprim eye drops 4 times a day was prescribed.
A 16-year-old boy presented for evaluation of his worsening behavior at school. He was very hyperactive and had difficulty in paying attention. He had always required help with reading and language. Maternal pregnancy and birth history were unremarkable.