<prompt> Field defect seen in pituitary adenoma is -Bitemporal hemianopiaBinasal hemianopiaQuadrantanopiaPie in sky defect  <response>: The characteristic visual field defect in pituitary adenoma is bitemporal hemianopia due to central optic chiasma lesion. However in early stages qudrantanopia superior: - Pie in sky or inferior: Pie on the floor may also occur, but these are not characteristics. 