HP-OCT™ brings a new level of quantification to the topography of the ocular surfaces which is not dependent on the tear-film quality (a limitation of keratometry and Placido disc topography) or fixation stability (a limitation of photographic/Schiempflug based techniques). The volume acquisition also provides complete 3D biometric information, including lens position, curvature and tilt and axial length, as well as volume images for preoperative assessment of the patient’s cornea, conjunctiva, angle and health of the fundus.