A laser system to treat an object with a laser beam is provided, the laser system comprising a laser to generate the laser beam； a tomography system to generate a measurement beam and measure an optically transmissive material of the object； an optical delivery system coupled to the laser and the tomography system to deliver the laser beam and the measurement beam to the object； and a processor coupled to the laser, the tomography system, and the optical delivery system. The processor comprises a tangible medium embodying instructions to place a mark on the object with the laser beam in response to a target location and measure a location of the mark with the measurement beam, and compare the location of the mark with the target location and calibrate the laser in response to the location of the mark and the targeted location of the mark.
