Visual field defect in a woman with pituitary adenoma compressing the optic chiasma
Ref: Kanski: Clinical Ophthalmology; 7th edition.Explanation:Normal chiasmal position is seen in 80%Prefixed chiasma - placed in front of the pituatory fossa - 10%Postfixed chiasma - placed posteriorly above the pituatory fossa-10%.
Homonymous hemianopia
Bitemporal hemianopia
Bi nasal hemianopia
Quadrantanopia
Lesions of the Visual Pathway