Congenital optic tract syndrome
C. E. Margo, L. M. Hamed and J. McCarty
Department of Ophthalmology, University of Florida, College of Medicine, Gainesville.
We describe two patients with complete homonymous hemianopia who were
unaware of their visual field defects. The clinical impression of an optic
tract syndrome was confirmed by magnetic resonance imaging, which showed
absence of the corresponding tract in each case. The pathogenesis of
congenital absence of the optic tract is unclear but it could represent
either a primary failure of development or secondary atrophy due to focal
injury during the perinatal period.