Bilateral morning glory syndrome with midline brain lesion in an autistic child.

A ten-year-old autistic boy with high myopia and very poor vision presented a bilateral anomaly of the disc, diagnosed as morning glory syndrome. Further investigation showed an absence of the corpus callosum and probably herniation of an encephalocele into the third ventricle. The association of bilateral morning glory syndrome and very low visual acuity in both eyes with a midline brain lesion and autism has not been previously described.