puck blunders in carrying out the orders of oberon.to what extent does it influence the course of events?

Oberon decides to play a trick on Titania and put some pansy juice on her eyes. The magical juice will make her fall in love with first person she sees upon waking up. Soon after Puck is sent away to fetch the juice, Oberon overhears Demetrius and Helena in the woods. Oberon decides that he will change this situation, and commands Robin to put the juice onto Demetrius's eyes when he is sleeping. He then finds Titania and drops the juice onto her eyelids. Robin goes to find Demetrius, but instead comes across Lysander and accidentally uses the juice on him. This begins a chain reaction of "misplaced" love and character personalities which pretty much drives the action in the play.Shakespeare loves the whole theme of mismatched love and innuendo in his comedies.