English version

eye-opener

From Longman Dictionary of Contemporary Englisheye-openerˈeye-ˌopener noun [countable usually singular]  SURPRISEDan experience from which you learn something surprising or new The whole trip has been a real eye-opener.
Examples from the Corpus
eye-openerIt had been my first alpine climb, and it had been an eye-opener.A visit to a farm is an eye-opener to a city child.I never put that much stock in images, and to have him do that-that was just an eye-opener.It was an eye-opener, and it was puzzling.It is not readily apparent that Edinburgh is a busy seaport but a visit to Leith Docks can be a fascinating eye-opener.This can be a real eye-opener in many parts of the world.Jimmy thought her a real eye-opener.
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