Near point - near point
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〘Noun〙① The closest point that can be seen clearly using the maximum of the eye's ability to adjust. It is expressed in terms of distance from the eye. For normal adult eyes, it is about 10 centimeters, and with age it moves further away, and at more than 30 centimeters it becomes presbyopia. [Modern Terminology Dictionary (1931)]② The point equivalent to the perihelion or perigee in the orbit of a celestial body. Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information |
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〘名〙① 目の調整力を最大限に用いて、明瞭に見ることのできる最も近い点。目からの距離で表わし、成人の正常な目では約一〇センチメートルで、年齢とともに遠ざかり、三〇センチメートル以上になれば老眼となる。〔現代術語辞典（1931）〕② 天体の運行軌道における近日点、近地点に相当する点。
出典 精選版 日本国語大辞典精選版 日本国語大辞典について 情報 |
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