open eyes to
open someone's eyes to someone or something
Fig. to cause someone, including oneself, to become aware of someone or something. We finally opened our eyes to what was going on around us. The events of last night opened my eyes to Tom.
open somebody's eyes to something
to make someone understand something for the first time and know how difficult or unpleasant it is Having children of my own opened my eyes to the hurt I had caused my parents.