Lesion of optic tract causes?: (A) Binasal hemianopia, (B) Bitemporal hemianopia, (C) Homonymous superior quadrantonopia, (D) Homonymous hemianopia
Answer is D. Ans. (d) Homonymous hemianopiaRef.: Harrison's 19th ed. /198-199* Unilateral optic nerve lesion: Unilateral blindness* Binasal hemianopia: Bitemporal optic chiasma lesion. Two different lesions compressing the chiasma from the lateral parts.* Bitemporal hemianopia: Binasal retinal damaged optic chiasmal lesion. Commonest lesion is pituitary adenoma.* Homonymous hemianopia: lesion at optic tract AND optic radiation* Homonymous superior quadrantonopia: All superior quadrantonopia goes to the temporal lobe (pie in the sky).* Homonymous inferior quadrantonopia: All inferior quadrantonopia goes to the parietal lobe (Pie on the floor).* Homonymous hemianopia w/ macular sparing: Lesion in occipital cortex les