Duke-Elder 曾述“视交叉受压迫时不易产生仅限于一眼的视野缺损,黄斑纤维也很难单独受波及;因此中央部的缺损,一般合并有周边视野缺损。”作者不同意上述说法。他记述很多病例常在开始时为一眼有傍中心或中心缺损,继之出现对侧眼顳侧缺损。病症如下:(1)视交叉病变视野有中心缺损:一般双颞侧偏 Duke-Elder has said “The optic chiasm oppression is not easy to produce only one-sided visual field defect, macular fiber is difficult to be affected alone; so the central department of the defect, the general merger with peripheral visual field defects.” "The author disagrees with the above statement . He described a lot of cases often at the beginning of a PAG center or center defect, followed by the contralateral eye temporal defect. Illnesses are as follows: (1) visual cross-sectional lesions have a central defect: the general double temporal deviation