lidless

Having no lid or lids.

Watchful; vigilant. Used of an eye or eyes.

Having no lid; especially, having no eyelids; hence, poetically, incapable of closing the eyes; sleepless; perpetually vigilant.

Having no lid, or not covered with the lids, as the eyes; hence, sleepless; watchful.

without a lid

not having or covered with a lid or lids

always watchful

having no lid