"Then there are things with big leaves which Grandfather calls Bright Eyes"

There are about 450 different kinds of Eyebright (Euphrasia).  

One common type of Eyebright which grows in the Swiss Alps is Alpine eyebright. Its Latin name is Euphrasia alpina.

 

 

Euphrasia alpina
Creative Commons Attribution Share AlikeEuphrasia alpina - Credit: User: Tigerente