What does mean OLHO MÁGICO??

"Olho mágico" is a small hole in a door or wall that you can see through.
In english is is called: peephole


* Ela sempre olha pelo olho mágico antes de abrir a porta.(She always looks through the peephole before opening the door.)

* Olhei pelo olho mágico, mas não tinha ninguém. (I looked through the peephole, but there was nobody there.)