Word for "seeing without being seen"
Is there a word for seeing without being seen? I want to write about those on the advantageous side of tinted glasses. Visual/optical eavesdropping is the closest phrase I can think of.
Try covert, as in covert surveillance, or in your example, a covert observer.
I'd probably go with spying:
to watch secretly usually for hostile purposes
Does incognito work for your purposes?
: with one's identity concealed