Wide-eyed:

wide-eyed
adj.
1. Having the eyes completely opened, as in wonder.
2. Innocent; credulous.

wide-eyed
Adjective
1. innocent or naive
2. surprised or frightened: wide-eyed astonishment
Adverb
in a frightened, surprised, or excited manner: they looked at me wide-eyed


Adj.
1.
wide-eyed - exhibiting childlike simplicity and credulity; "childlike trust"; "dewy-eyed innocence"; "listened in round-eyed wonder"
dewy-eyed, round-eyed, childlike, simple
naif, naive - marked by or showing unaffected simplicity and lack of guile or worldly experience; "a teenager's naive ignorance of life"; "the naive assumption that things can only get better"; "this naive simple creature with wide friendly eyes so eager to believe appearances"
2.
wide-eyed - (used of eyes) fully open or extended; "stared with wide eyes"