<prompt> Bitemporal hemianopia is characteristic of -GlaucomaOptic neuritisPituitary tumorRetinal detachment  <response>: Ans. is c i.e., Pituitary tumor o Characteristic visual field defect of central chiasmatic lesion is bitemporal hemianopia. Pituitary tumor causes central chiasmatic lesion.o Bitemporal hemianopia results due to central sagittal lesion of the optic chiasma. common causes of which are tumors of the pituitary gland most common, craniopharyngioma, suprasellar meningioma, glioma of third ventricle, chiasmal arachnoiditis, and third ventricular dilatation.Site of lesionVisual field defectOptic nerveOptic chiasmaOptic tractLateral geniculate bodyOptic radiation TotalOptic radiation lower fibres temporal lobeOptic radiation upper fibres parietal lobeVisual cortex anterior occipital cortexOccipital cortex tipBlindnessBitemporal hemianopiaIncongruent homonymous hemianopiaHomonymous hemianopiaHomonymous hemianopia, sometimes with macular sparingHomonymous upper quadrantanopiaHomonymous lower quadrantanopiaHomonymous hemianopia with macular sparingHomonymous macular defect 