Field defect seen in pituitary adenoma is -
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.
Bitemporal hemianopia
Binasal hemianopia
Quadrantanopia
"Pie in sky" defect