text_1: 已知 缺失 程度 与 通过 微 视野 检查 24 - 27 判定 的 功能 相关 , 因此 可 用作 疾病 进展 的 指标 .
  
text_2: the extent of loss is known to correlate with function as assessed by microperimetry24 @-@ 27 and hence can be used as a measure of disease progression .
  