Aqueous humor

Japanese: aqueous humor(英語表記)aqueoushumor
Aqueous humor

…Since the size of the vitreous body is almost constant, the increase or decrease in the volume of aqueous humor mainly determines intraocular pressure. Aqueous humor is a transparent liquid that contains almost no cells or proteins. It is produced by ultrafiltration and active transport in the ciliary epithelium, passes through the pupil, and is mostly discharged outside the eyeball via the trabecular meshwork in the anterior chamber angle (where the cornea and iris meet in the eye chamber) and the Schlemm canal. In this flow, aqueous humor provides oxygen and nutrients to the lens and cornea, and also carries metabolic products from within the eye out of the eyeball. …

From [Uvea (grape vein)]

…It cannot be seen from the outside of the eyeball, and special contact lenses are used for examination. The surface of the ciliary body has the function of secreting aqueous humor (a fluid that fills the space from the cornea to the Zonule of Zinn), and is attached to the Zonule of Zinn, a fibrous tissue that suspends the lens. The muscles inside it are the longitudinal muscles and the circular muscles, which mainly focus the fundus image, i.e., perform the function of accommodation. …

*Some terminology explanations that mention "aqueous humor" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…このうち硝子体の大きさはほぼ一定しているため,房水の量の増減が主として眼圧を決定することになる。房水aqueous humorは,細胞やタンパク質をほとんど含まない透明な液体で,毛様体上皮で限外ろ過や能動輸送により産生され,瞳孔を通過し,大部分は前房隅角部(眼房内の角膜と虹彩が接するところ)の繊維柱帯,シュレム管Schlemm tubeを経て眼球外に排出される。この流れの中で房水は,水晶体や角膜に酸素や栄養を与え,かつ眼内の新陳代謝産物を眼球外へ運びだす。…

【ぶどう膜(葡萄膜)】より

…眼球の外側からは見えず,検査のときは特殊なコンタクトレンズを用いる。毛様体の表面には房水aqueous humor(角膜からチン小帯までの空間を満たす液体)の分泌機能があり,さらにチン小帯Zinn’s zonuleという水晶体を懸架する繊維組織が付着する。内部の筋肉は縦走筋と輪状筋があり,主として眼底像のピント合せ,すなわち調節作用を行う。…

※「aqueous humor」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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