1. A method, of treating an eye of a patient, comprising: providing a geometric representation of the eye, based, at least in part, on anatomic data obtained by an imaging apparatus; emitting a first x-ray beam such that the first beam passes through a first region of the eye to a target within the eye; emitting a second x-ray beam such that the second beam passes through a second region of the eye to substantially the target within the eye, wherein the first region and second region of the eye through which the first beam and second beam pass are selected based on the geometric representation of the eye; determining whether a position of the eye has changed beyond a movement threshold during at least one of the emitting the first x-ray beam, emitting the second x-ray beam, and a period of time between emitting the first x-ray beam and emitting the second x-ray beam to the target; and when the position of the eye is determined to have changed beyond the movement threshold, moving the eye to a pre-determined position.