Having the eyes wide open, as in surprise.(adjective)
Watchful and alert.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "open-eyed" in a sentence
"In a 2001 speech that has prompted wide debate and is likely to be part of her nomination hearings, Sotomayor, now a judge on a federal appeals court, described her concept of an open-eyed justice: one who aspires to impartiality but cannot be divorced from her gender, ethnicity and upbringing."
"His closing line: "I bow my head to the youth of Iran, the youth that is open-eyed, bold and far stronger and more numerous than the near-beardless vigilantes.""
"Despite her heavy heart she watched in open-eyed wonder as together they left the Bay of Lost Dolphins, left the jagged rocks of the coast, and headed out to the open sea."