Interruption of the optic chiasm will lead to:
(A) Bitemporal hemianopia (B) Binasal hemianopia (C) Homonymous hemianopia (D) Normal vision
(A) Answer- A. Bitemporal hemianopiaInterruption of the optic chiasma will lead to bitemporal homonymous hemianopia because optic chiasma contains crossed over meclial fibers from both optic nerves, which are responsible for temporal Jield of vision."Hemianopia denotes loss of half of the field of vision. The commonest clinical form is homonymous hemianopia, in which the right or left half of the binocular field of vision is lost, owing to loss of the temporal half of one field and lhe nasal half of the other. This condition is due to a lesion situated in any pa of the visual paths from the chiasma to the occipital lobe.