眼底yǎndǐ 1.医学上指用某种器械通过瞳孔所能观察到的眼内构造。如脉络膜、视网膜、视神经乳头等。{eyeground; fundus of the eye (fundus oculi), including choroid retina and optic nerve papilla, etc.} 2.眼睛跟前;眼里{in one's eyes; in sight}: 登楼一望,全城景色尽收～。{Mount the pavilion and you get an overview of the city.}