Abstract: Lacrimal implants providing secure, wedgable retention within a lacrimal punctum and associated canaliculus of an eye are disclosed. The lacrimal implants can comprise an implant body, including first and second portions, extending from a proximal end of the first portion to a distal end of the second portion. The second portion includes a retention projection. The implant body can also include a cavity longitudinally extending from the proximal end of the first portion toward the second portion, wherein the cavity is shaped and sized to receive an insertable actuator, and wherein the retention projection is configured to bias outward or change orientation when the insertable actuator is seated within the cavity.

Abstract: The present invention provides methods and apparatus for measuring and/or marking the internal features of a patient body when those features are viewed under fluoroscopy or another medical imaging modality. Although suitable for the physiological measurement of many body lumens, including the intestines, the urethra, and the like, the present invention will find its most immediate use in the measurement of vascular lesions, particularly vascular aneurysms adjacent the aortoiliac junction and other bifurcations. The positions and bend angles of such branching body lumens can be accurately mapped on a panel which remains outside the patient body. By imaging the patient through the panel, and by providing markings on the panel which give a bright contrast when imaged, the panel provides a guide that highlights the length, position, and geometry of the luminal lesion.