I am always thinking in making comics, how can I make things as clear as possible? To that end I rely on a great deal of cinematic codes and conventions, as well as established editing techniques. This here is an example of an eyeliner match. A shot of the character looking, and then to the thing being looked at and then back to the protagonist. 

This could be repeated a number of times in order to build drama or to indicate an unveiling of extra details, as in the example here from Italian director Dario Argento in his 1996 horror film The Stendhal Syndrome.