Homonymous hemianopia may be seen in lesion of all of the following, EXCEPT:: (A) Optic chiasma, (B) Optic tract, (C) Optic radiation, (D) Occipital lobe
Answer is A. Lesion of the optic chiasma result in bitemporal hemianopia not homonymous hemianopia. Lesions of the visual pathway and corresponding field defects: Lesion of optic nerve: Ipsilateral blindness Lesion through proximal pa of optic nerve: Ipsilateral blindness with contralateral quadrantanopia. Lesion of optic tract: Homonymous hemianopia Lesion of temporal lobe: Quadrantic homonymous defect Lesion of optic radiation: Homonymous hemianopia with occasional sparing of the macula Lesion in anterior pa of occipital coex: Contralateral temporal crescentic field defect Lesion of occipital lobe: homonymous hemianopia usually sparing of the macula Ref: Textbook of Ophthalmology By H. V. Nema, page 340