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.
open someone's eyesenlighten 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.