…A sense caused by light stimuli is called light vision, which is the sense of light and darkness, and color vision, which is the sense of color. The main sensory organ is the eye. Primitive light sense is caused by the neurophotoreceptor and the cutaneous photoreceptor. Well-developed vision, like hearing and smell, is an important sense for animals to obtain information from faraway places. Vision is particularly superior for understanding the external situation in three dimensions. Visual functions are divided into distinguishing light and dark, distinguishing the direction of the light source, distinguishing the shape and movement of an object, distinguishing the distance to an object, and color discrimination. … *Some of the terminology that refers to "rod photoreceptors" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…光刺激によって生じる感覚で,明暗を感じる感覚を光覚,色を感じる感覚を色覚という。おもな感覚器は目である。原始的な光覚は神経光覚器や皮膚光覚器によって起こる。よく発達した視覚は聴覚や嗅覚と同様に,動物が遠くはなれた所からの情報を得るのに重要な感覚である。ことに外部の情況を立体的に知るうえでは視覚が最も優れている。視覚機能は明暗識別や光源の方向識別,あるいは対象物の形態や動き,対象物までの距離などの識別や色彩弁別に分けられる。… ※「杆型視細胞」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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