open someone's eyes

open (one's) eyes

1. To see or realize the truth about something. Open your eyes, Stan—they're just using you for cheap labor!
2. To cause one to see or realize the truth about something. The documentary really opened my eyes about the conditions in that country.
See also: eye, open
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

open someone's eyes

enlighten someone about certain realities; cause someone to realize or discover something.
1998 Scoular Anderson 1314 & All That These events opened his eyes to what had happened to his country. Now his one wish was that Scotland should be independent.
See also: eye, open
Farlex Partner Idioms Dictionary © Farlex 2017
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References in periodicals archive ?
I have been to more vegan marches and protests than I can count, and I never want to shy away from an opportunity to open someone's eyes to the truth.
But hopefully it might open someone's eyes to see if it could be done slightly differently if it occurred again.