Last Updated:2025/11/19
A unit of measure of the power of a lens or mirror, equal to the reciprocal of its focal length in meters. Myopia is diagnosed and measured in diopters.
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diopter
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Source Word
diopter
Noun
dated
obsolete
Japanese Meaning
レンズや鏡の屈折力を測る単位。焦点距離(メートル単位)の逆数として定義され、近視の診断や測定等に用いられる。
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( plural )