Ophthalmic range finding

A system for analyzing a patient's eye comprising: a laser configured for directing a pulsed laser beam along a path; an optical beam-splitting device disposed along the path from the laser, the optical beam-splitting device configured to circularly polarize the laser beam; an objective component including a focusing lens to focus the circularly polarized laser beam within the eye; a sensor oriented along the path, wherein the sensor receives a back-reflected laser beam from the eye, and generates a signal corresponding to that laser beam; and a computing device communicatively coupled with the sensor and configured to receive the signal; wherein the computing device is configured to determine the location of an anatomical feature of the eye based on the signal.