眼ㄧㄢˇyǎn底ㄉㄧˇdǐ

  1. 眼裡、眼睛跟前。《兒女英雄傳·第三七回》：「及至掬出去，放在眼底看看，依然還要放在嘴裡嚼嚼咽下去。」

英fundus of the eye (containing the choroid, retina, optic nerve etc)​, inside the eye, right in front of one's eyes, in full view as a panorama
法fond de l'oeil, intérieur de l'oeil, juste en face de ses yeux