…(1) normal vision, which focuses an image on the retina; (2) near sighted eye, which focuses an image in front of the retina; (3) farsightedness, which focuses an image behind the retina; (4) astigmatism, which focuses no image anywhere. All of the above (2) to (4) are called refractive errors. … *Some of the terminology that mentions "farsightedness" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…(1)正視 網膜に像を結ぶもの,(2)近視myopia∥near sighted eye 俗に近眼ともいう。網膜の前方に像を結ぶもの,(3)遠視hyperopia∥farsightedness 網膜の後方に像を結ぶもの,(4)乱視astigmatism どこにも像を結ばないもの。正視以外の(2)~(4)を屈折異常という。… ※「farsightedness」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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