Edgar Allan Poe's 'The Tell-Tale Heart'

Edgar Allan Poe's “The Tell-Tale Heart” is a story about a man, which is the narrator, and who for seven nights, goes to the bedroom of the old man to watch him sleep. He would stand in the door watching the man sleep with his light shining just enough to see the sleeping man’s eye, the “Evil eye” according to the narrator. Every time he went into the man’s room, he could not see the eye because his eyes were closed.
The narrator said he did not hate the old man, and that he actually loved him. But he thinks it was the old man’s eye. He refers to the eye as a “vulture eye”, and that every time the old man would look at him, he would feel a cold feeling up and down his back.
On the eighth night of him going into the man’s room, he awakens