...developmentally, the iris, which exists as a thin, disc-shaped membrane in the eye, has a round hole in the center that allows light into the eye. In bright conditions, the pupil becomes smaller (called miosis), reducing the amount of light entering the eye. In dark conditions, the pupil becomes larger (called mydriasis), allowing more light to enter the eye. *Some of the terminology that mentions "miosis" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…発生学的には,眼球腔中に円盤状の薄い膜として存在する虹彩のほぼ中央に,眼球内へ光を入れるために丸い孔があいたものである。明るいところでは,瞳孔を小さくし(これを縮瞳miosisという),眼球内に入ってくる光の量を少なくする。暗いところでは,逆に瞳孔を大きくし(これを散瞳mydriasisという),眼球内に入ってくる光の量を多くする。… ※「miosis」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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