This is the 1800th most frequent Chinese word.
眼睛
Eye.
Here, '眼睛' is used to refer to the physical organ ('eyes') and its ability (sharpness).
我的眼睛非常敏锐。
My eyes are very sharp.
In this sentence, '眼睛' is used to metaphorically express emotions shown through the eyes.
她的眼睛里充满了忧伤。
Her eyes are filled with sadness.
The term '眼睛' here is used in an action manner to direct closing the eyes for visualization.