Poe uses the unreliable narrator to force whoever is reading the story into thinking that he is crazy and unpredictable. In Tell-Tale Heart, the narrator compares animal features to things through his bad view of things. The narrator shows his fear by saying "vulture eye" to describe the old man's eye. The eye caused the narrator to kill the old man. Both of the stories include a murder and the body being hidden in the house.
In "The Black Cat," Pluto's damaged eye is the next