| 摘要 |
Herein disclosed is a system for cataract surgery on an eye of a patient, comprising a laser source configured to produce a treatment beam comprising a plurality of laser pulses; an integrated optical system comprising an imaging assembly operatively coupled to a treatment laser delivery assembly such that they share at least one common optical element, the integrated optical system being configured to acquire image information pertinent to one or more targeted tissue structures and direct the treatment beam in a 3-dimensional pattern to cause breakdown in at least one of the targeted tissue structures; and a controller operatively coupled to the laser source and integrated optical system, and configured to adjust the laser beam and treatment pattern based upon the image information, and distinguish two or more anatomical structures of the eye based at least in part upon a robust least squares fit analysis of the image information. One of the two or more anatomical structures comprises a cornea, a sclera, a limbus, an iris, a lens, or a lens capsule. The controller may be configured to conduct a series of least squares fit analyses, and to iteratively include a greater number of pixels in each successive least squares fit analysis. The controller may be configured to find a close least squares fit where the pertinent least squares fit analysis expects a spherical surface. The controller may be configured to find a close least squares fit where the pertinent least squares fit analysis expects an aspherical surface. The controller may be further configured to locate a boundary between the two or more anatomical structures. The boundary may be defined as the intersection between a cornea of the eye and a sclera of the eye. The boundary may be defined as the intersection between a cornea of the eye and an iris of the eye. The boundary may be defined as the intersection between a lens of the eye and an iris of the eye. The controller may be configured to utilize rejected points of a least squares fit analyses to identify an anatomical structure of the eye. |
