round-eyed
From Longman Dictionary of Contemporary Englishround-eyedˌround-ˈeyed adjective having eyes which are wide open because of shock, fear etcExamples from the Corpusround-eyed• Believing it was Travis, she froze round-eyed as she found herself gazing into four faces as surprised as her own.• Civilians and soldiers mixed with round-eyed ladies from somewhere.