eyes of the night
Poetic or literary expression for the ability to see at night, or the night's watchful gaze. Rare standalone; mostly encountered in set phrases.
eyes asleep; at night
Used almost exclusively in the idiom 夜の目も寝ない (not sleeping a wink, staying up all night). The sense 'at night' is implied by the idiom.
See also: 夜の目も寝ない
The word 夜の目 has a poetic ring, like the power to see through the night.
He kept working without sleeping a wink.
夜の目も寝ない is an idiom meaning to stay up all night without sleeping.