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1·Using an instrument called a phoropter, an optometrist places a series of lenses in front of your eyes and measures how they focus light using a hand held lighted instrument called a retinoscope.

在使用综合验光仪时，验光师会将一套的镜片放在眼睛的前面，并通过一种名叫眼底镜的轻便简易的仪器测量出它们是如何聚焦光线的。