Abstract: In at least some examples, a method of treating an eye, includes (i) imaging a patient's vitreous using a probe, (ii) defining a window on a desired region of the vitreous, (iii) administering ultrasonic energy treatment to the desired region within the window, (iv) continually monitoring the treatment via the probe, (v) adjusting a characteristic of the ultrasonic energy treatment based on the monitoring, (vi) re-imaging the desired region of the vitreous after the treatment is administered, and (vii) evaluating or observing the desired region to determine whether a target percentage of a vitreous opacity has been resolved.