This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Ophthalmology
Homonymous hemianopsia is associated with lesion at 
Select and explain. 
A. Visual cortex, B. Optic radiation, C. Optic tract, D. Optic chiasma
C: Optic tract
Answer: C: Optic tract 
Explanation: (C) Optic tract > It is difficult to localize a postchiasmal lesion accurately, because injury anywhere in the optic tract, lateral geniculate body, optic radiations, or visual cortex can produce a homonymous hemianopia, i.e., a temporal hemifield defect in the contralateral eye and a matching nasal hemifield defect in the ipsilateral eye