Corneal topography measurements and fiducial mark incisions in laser surgical procedures

A laser cataract surgery system for treating an eye of a patient, comprising:

• a laser source configured to produce a pulsed laser beam;
• a topography or tomography measurement system configured to measure a topography or tomography of the eye;
• a camera configured to capture images of the eye;
• an optical system configured to receive and direct the pulsed laser beam to the eye;
• a processor in operable communication with the laser source, the topography or tomography measurement system, the camera, and the optical system, wherein the processor is configured to:
• control the topography or tomography measurement system to measure a topography or tomography of the eye without a patient interface contacting the eye;
• control the camera to capture a non-contact iris image of the eye without the patient interface contacting the eye;
• identify one or more tissue structures of the eye in the non-contact iris image;
• determine a non-contact treatment axis of the eye based on the topography or tomography of the eye that has been measured without the patient interface contacting the eye;
• after the patient interface has been placed in contact with the eye, control the camera to capture a contact iris image of the eye with the patient interface contacting the eye;
• identify the one or more tissue structures of the eye in the contact iris image;
• based on the identified tissue structures in the non-contact and contact iris images, determine a rotation and translation between the non-contact and contact iris images;
• determine locations and incision profiles of one or more fiducial marker incisions with the patient interface contacting the eye based on the non-contact treatment axis and the rotation and translation;
• and
• with the patient interface contacting the eye, control the laser source and the optical system to form one or more incisions in one or more tissues of the eye using the pulsed laser beam, including forming the one or more fiducial marker incisions based on the determined locations and incision profiles of the one or more fiducial marker incisions.