Explain the difference between power and vertex power from basic definitions of optics, and analyze the measuring principle and error of focimeter.
从光学的基础定义出发，阐述光
和
的差别，并对计的测量原理和
差进行正确
析。
点计Explain the difference between power and vertex power from basic definitions of optics, and analyze the measuring principle and error of focimeter.
从光学的基础定义出发，阐述光和的差别，并对计的测量原理和差进行正确析。
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