From Longman Dictionary of Contemporary Englishopen somebody’s eyes (to something)open somebody’s eyes (to something)REALIZEto make someone realize something that they had not realized before The purpose of the training is to open managers’ eyes to the consequences of their own behaviour. → open
Examples from the Corpus
open somebody’s eyes (to something)• I gave a little meow to get his attention and he opened his eyes.• Soon he could not move or speak, or open his eyes.• When he opened his eyes again he was staring at a pinkish whirlpool running into the drain.• Jim opened his eyes and looked at Karen.• When I opened my eyes, I looked out to the stake and saw his ball fall right near it again.• I opened my eyes into a black web.• His voice sounded oddly strangled, and she opened her eyes to find his face unexpectedly close to hers.• He opened his eyes to make the words stop.• His speech really opened my eyes to the way big corporations operate. 