making someone to open his/ her eyes and learn/ understand the previously unknown
Definitions (粵典–words.hk)
語句
開闊視野,增長見識 eye-opening
今次交流團令我大開眼界。
今次交流团令我大开眼界。
gam1 ci3 gaau1 lau4 tyun4 ling6 ngo5 daai6 hoi1 ngaan5 gaai3. This study tour is an eye-opening experience.
Definitions (Wiktionary)
phrase, idiomatic
eye-opening; able to broaden one's horizon
我在這裏接觸了這麼多的新鮮事物,我真是大開眼界。
我在这里接触了这么多的新鲜事物,我真是大开眼界。
wǒ zài zhè lǐ jiē chù le zhè me duō de xīn xiān shì wù , wǒ zhēn shì dà kāi yǎn jiè . I have come into contact with so many new things here — it's been really eye-opening.