Answer:
In this poem, the irony is that the last thing the author can perceive while waiting for her death is a fly buzzing while waiting for death to come to her.
Explanation:
As is already known, Emily Dickinson was known for dealing with subjects such as death. The fascination that this author had with the death led her to write great poems that were highly recognized in the environment.
One of them is "I Heard a Fly Buzz When I Died".
While she waits for death, and for the "<em>King</em>" who comes to look for her (which could be interpreted as God), the visit she receives is not from any divinity, but rather from a fly, which ironically represents the opposite of the divine, or to a paradise. The fly is the one that comes to rest on her dead flesh while everyone is there with her waiting for that moment.
