皮质盲 大脑后动脉的枕叶是视觉中枢,该处病变如脑动脉硬化症发生血栓形成,以及外伤、心跳骤停、中毒、妊娠高血压、子痫、代谢性脑病等,都可导致失明,这种失明称为“皮质盲”。老年人动脉硬化或有心血管病的人,应特别警惕皮质盲。 垂体瘤 患脑垂体肿瘤,肿瘤压迫视神经的交叉部位,发病早期可引起双颞侧偏盲,逐渐可发展成完全失明。因为脑垂体位于视神经交叉的下方,如发生肿瘤,有96％的人会出现视力障碍。该病应及早手术,解除对视神经的压迫。 Cortical blind posterior cerebral artery occipital lobe is the visual center, where lesions such as cerebral arteriosclerosis thrombosis, and trauma, cardiac arrest, poisoning, pregnancy-induced hypertension, eclampsia, metabolic encephalopathy, can lead to blindness, This blindness is called “cortical blindness.” Elderly people with atherosclerosis or cardiovascular disease, should be particularly cautious of cortical blindness. Pituitary tumor with pituitary tumor, tumor oppression of the optic nerve of the cross site, early onset can cause bilateral temporal hemianopsia, and gradually developed into complete blindness. Because the pituitary is located below the optic nerve intersection, such as the occurrence of tumors, 96% of people will have visual impairment. The disease should be as early as surgery to lift the oppression of the optic nerve.