This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuro-ophthalmology, Subject name: Ophthalmology
Field defect seen in papilloedema 
Select and explain. 
A. Seidel's scotoma, B. Constriction of peripheral fields, C. Centro-caecal scotoma, D. Altitudinal hemianopia
B: Constriction of peripheral fields
Answer: B: Constriction of peripheral fields 
Explanation: In papilloedema, as the condition progresses vision worsens with an enlargement of the blind spot owing to separation of the retina around the disc by the oedema and a progressive contraction of the visual field due to atrophy of the optic nerve. Ref: Parson's 22 nd edition, page no. 352