open smb.'s eyes (or the eyes of smb.) to smth.

   oткpыть кoму-л. глaзa нa чтo-л., вывecти кoгo-л. из зaблуждeния, зacтaвить кoгo-л. пpoзpeть

    Yes, it is you, my friend, who have opened my eyes to new horizons which I did not even dream of before (A J. Crown)