<prompt> Visual field defect in a woman with pituitary adenoma compressing the optic chiasmaHomonymous hemianopiaBitemporal hemianopiaBi nasal hemianopiaQuadrantanopia  <response>: Ref: Kanski: Clinical Ophthalmology; 7th edition.Explanation:Normal chiasmal position is seen in 80Prefixed chiasma - placed in front of the pituatory fossa - 10Postfixed chiasma - placed posteriorly above the pituatory fossa-10. 