公开(公告)号：US20240374428A1

公开(公告)日：2024-11-14

申请号：US18661507

申请日：2024-05-10

Applicant: AMO Development, LLC

Inventor： Alireza Malek Tabrizi ,  Griffith Altmann ,  Harvey Liu ,  Zenon Witowski ,  Mohammad Saidur Rahaman ,  Hong Fu

IPC: A61F9/008

Abstract: During laser ophthalmic procedures, back-reflected treatment laser light is detected by an auto-Z module and analyzed in real-time to determine various aspects of laser-tissue interaction during the procedure. This method can detect the presence of “black spots” (locations where no laser-tissue interaction occurred), sub-optimal incision quality, etc. in real time, and allows for dynamical adjustment of the laser treatment parameters such as pulse energy, laser spot separation, etc. to correct the detected problems. The auto-Z signal analysis may also depend on which incision segment or region is currently being cut, to optimally control different cutting segments. This method improves corneal incision quality and helps to achieves consistent laser-tissue interaction from patient to patient.

公开(公告)号：US20220378615A1

公开(公告)日：2022-12-01

申请号：US17664034

申请日：2022-05-18

Applicant: AMO Development, LLC

Inventor： Alireza Malek Tabrizi ,  James Hill ,  Nima Khatibzadeh ,  Pavel Vodkin ,  Harvey Liu ,  Hong Fu ,  Griffith Altmann

IPC: A61F9/008

Abstract: A method implemented in an ophthalmic surgical laser system for forming a corneal flap in a patient's eye with improved bubble management. The flap includes a horizontal bed and a vertical or near vertical side cut around the periphery of the bed except for an uncut hinge area. The side cut has a bubble barrier layer that can prevent bubbles formed by the laser-tissue interaction from escaping into an interface between the corneal and the patient interface lens. In some embodiments, the bubble barrier layer is a thin uncut layer, located in the epithelium of the cornea, that separates the side cut into two portions. In other embodiments, the side cut does not reach the anterior corneal surface, leaving an uncut bubble barrier layer located with the epithelium. In other embodiments, an additional side cut portion is formed through the uncut bubble barrier layer as the last step.

公开(公告)号：US20230181368A1

公开(公告)日：2023-06-15

申请号：US17643812

申请日：2021-12-10

Applicant: AMO Development, LLC

Inventor： Cynthia Villanueva ,  Deepali Mehta-Hurt ,  Hong Fu ,  Jiandong Xu ,  Alireza Malek Tabrizi ,  Griffith Altmann

IPC: A61F9/008 ,  G02B26/10

CPC classification number: A61F9/00827 ,  G02B26/101 ,  G02B26/108 ,  A61F2009/0087 ,  A61F2009/00897

Abstract: An ophthalmic surgical laser system and method for forming a lenticule in a subject's eye using “fast-scan-slow-sweep” scanning scheme. A high frequency scanner forms a fast scan line, which is placed by the XY and Z scanners at a location tangential to a parallel of latitude of the surface of the lenticule. The XY and Z scanners then move the scan line in a slow sweep trajectory along a meridian of longitude of the surface of the lenticule in one sweep. Multiple sweeps are performed along different meridians to form the entire lenticule surface, and a prism is used to change the orientation of the scan line of the high frequency scanner between successive sweeps. In each sweep, within a central area of the lenticule where the sweeps overlap, the laser is periodically blanked (or delivered with significantly reduced pulse energy) to reduce the total energy delivered in that area.

公开(公告)号：US20220062049A1

公开(公告)日：2022-03-03

申请号：US17446018

申请日：2021-08-26

Applicant: AMO Development, LLC

Inventor： Hong Fu ,  Mohammad Saidur Rahaman ,  Alireza Malek Tabrizi ,  Zenon Witowski ,  Griffith Altmann

IPC: A61F9/008

Abstract: A method for forming deep corneal lamellar incision parallel to the posterior corneal surface when the eye is docked to the patient interface. A lower-energy detecting beam generated by the same pulsed laser that generates the higher-energy treatment laser beam is utilized to measure the posterior corneal surface profile. The detecting beam is scanned in the eye according to a first 3-dimensional scan pattern, while intensity of the back-reflected light is measured by a light intensity detector. The first scan pattern may be a spiral pattern in the X-Y plane coupled with a Z direction oscillation function. Peaks of the light intensity signal are detected, and corresponding spatial positions of the focus point are obtained; a known offset distance is added to the depth value to obtain the posterior corneal surface profile. Based thereon, the treatment laser beam is scanned in the eye to form the deep corneal lamellar incision.