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.

• 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。