retina 是什么意思

名词复数:retinas

	n. (pl. retinas, -nae ) 【解剖学】视网膜。 adj. -l

the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve

The vertebrate retina ( , pl. retinae, ; from Latin rēte, meaning "net") is a light-sensitive layer of tissue, lining the inner surface of the eye.

	1.	A detached retina is more serious . 视网膜剥离就更严重了。
	2.	Rays light impinge upon the retina . 光线射到网膜上。
	3.	The periphery of the retina is very sensitive to motion . 视网膜的外围对运动非常敏感。
	4.	This property is used in the treatment of a detached retina . 这种特性可用来治疗视网膜脱离。
	5.	The choroid coat carries many blood vessels to supply the retina . 脉络膜通过许多血管为视网膜供应血液。
	6.	They predominate and are of greatest concentration in the central part of the retina . 它们在网膜中部占优势，具有最大的浓度。
	7.	Thus stimulation of one retina will normally invoke pupillary constriction in both eyes . 刺激一侧视网膜可引起双眼的瞳孔收缩。
	8.	To see an object distinctly, a sharp image of it must be formed on the retina . 为了清楚地看见一个物体，必须在视网膜上形成一个清晰的象。
	9.	The most distant object for which an image can be formed on the retina is then nearer than infinity . 这时，能成象在视网膜上的最远物体比无穷远近。
	10.	The receptive mechanism of the retina can also adapt itself to large differences in quantity of light . 视网膜的感受机构还可以自行调节以适应光量上的很大差别。

retina是什么意思