On Non‐hypophyseal Affections of the Chiasma

Central‐paracentral Scotoma and Intracranial Tumour

“…In one case the tumour was malignant and localised to the ethmoidal sinus and orbit on the left side with break through to the anterior fossa. A central scotoma seldom occurs with an orbital tumour (8,13). I n this case a defect of the lower half of the visual field developed rapidly ( fig.…”