目 录
一
1 范围
2 概述 (1)
3 计量性能要求··············································································…… (2)
3.1 示值误差·......................................................................................(2)
3.2 不对称性误差···········。·············，·················································…… (2)
3.3 舍入误差································································。················…… (2)
4 通用技术要求·················。····························································…… (2)
4.1 外观要求··············································································。··…… (2)
4.2 照明均匀性······························································。···············…… (3)
4.3 测量能力·················································································…… (3)
5 计量器具控制···························、··、·····················、·····、···········、···，·，·一 (3)
5.1 检定条件··································································。··············…… (3)
5.2 检定项目和检定方法····················。··············································一 (3)
5.3 检定结果的处理·............................................................................. (5)
5.4 检定周期········································。··。·····································…… (5)
附录A 瞳距仪检定记录 ············。··········································，··········…… (6)
附录B 瞳距仪检定证书 (背面)格式 ·····。··········································…… (7)
瞳 距 仪 检 定 规 程
范 围
本规程适用于瞳距仪的首次检定、后续检定和使用中检验。
2 概述
瞳距仪是在验光配镜过程中，用于测量人眼两瞳孔之间距离的一种测量仪器。
验光配镜一般需要对患者在视近和视远两种状态下的视力进行矫正。因此，瞳距测
量实际上也就包含了对患者视远时的瞳距测量和视近时的瞳距测量。通常情况下，是把
5m或5m以外的距离作为人眼的远用距离，而把300 mm作为人眼的近用工作距离。
人眼视物时，其视网膜上会形成影像。物点与视网膜中心的连线被称为视轴。人眼
的角膜及水晶体的光轴与视轴虽然很接近，却并不重合。人工测量瞳距，是指验光师用
直尺，直接测量患者右瞳孔的外侧 (或内侧)到左瞳孔的内侧 (或外侧)的距离，或测
量右瞳孔中心到左瞳孔中心的距离 (见图1)a瞳距用符号PD表示。
