一百多年来，临床实践已经证实脑垂体肿瘤（或视交叉部病变）可以引起双颞侧偏盲的视野改变。
It has long been known that bitemporal hemianopsia is one of the typical manifestations in patients with pituitary tumours.
大多数双颞侧偏盲患者P—VEP呈交叉不对称性分布。
The cross asymmetrical distribution of P-VEPs appears in most of the patients with bitemperal hemianopia.
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