等中心点实测剂量与计划剂量的误差在3%以内，其余偏离点的实测剂量与计划剂量误差在5%以内。
The errors between the measured dose and predicted dose in the central point were less than 3%, whereas the errors in another eccentric point were less than 5%.
顶焦度计又称对光机、查片机，可用来测量球光镜镜度、散光镜镜度、棱镜镜度以及散光轴线和光学中心点等，是眼镜片冷加工中必不可少的检测仪器。
The lensometers is also called measural lens dioptre instrument, to measure spherical lens dioptre, cylindric lens dioptre and axis, prism dioptre, and lens optical center etc.
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