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张力线法切开步骤图 ①:裂隙灯显微镜下标记张力线所在终点位;②、③:距后囊膜中央区0.5~1.0 mm处张力线上囊膜薄弱位置聚焦激光造孔,再沿张力线两侧垂直切开,延伸切开长度;④、⑤:距张力线两侧0.5~1.0 mm处囊膜薄弱位置聚焦激光造孔,再沿垂直于张力线方向向周边延伸切开