Hypoplasia of the right optic nerve (including the posterior part of the intraorbital segment, intracanalicular and intracranial segments) and optic chiasm (best evaluated on coronal T2-weighted images).
Lack of a septum pellucidum with concomitant mild flattening of the anterior horns of the lateral ventricles and a downward-sloping lower aspect of the anterior part of the horns (best evaluated on coronal T2-weighted images).