A method of guiding a surgical instrument during sinus surgery on a patient including receiving pre-operative patient data marked with a plurality of points defining a drainage pathway and determining a position of the surgical instrument relative to the planned drainage pathway. The method may further comprise generating an augmented reality image including a first visualization element representing the drainage pathway and a second visualization element comprising a plurality of circles spaced along the planned drainage pathway, and displaying the augmented reality image to help guide the surgical instrument. The method may also comprise generating an augmented reality image including a first visualization element representing the drainage pathway and a second visualization element representing the determined position of the surgical instrument relative to the drainage pathway.
