1) Alert 2) Topless 1) Always watchful 2) Having no lid 3) Lacking blinkers 
• (a.) Having no lid, or not covered with the lids, as the eyes; hence, sleepless; watchful.
Lid'less (lĭd'lĕs) adjective Having no lid, or not covered with the lids, as the eyes; hence, sleepless; watchful. « A lidless watcher of the public weal.» Tennyson. 
[adj] - having no lid 2. [adj] - not having or covered with a lid or lids 3. [adj] - without having the eyes closed or covered by the eyelids
sleepless adjective without having the eyes closed or covered by the eyelids; `to an eye like mine, a lidless watcher of the public weal`- Alfred Tennyson