Method for patterned plasma-mediated modification of the crystalline lens

a crystalline lens and plasma technology, applied in the field of ophthalmic surgical procedures and systems, can solve the problems of most dangerous steps and usual complications

Inactive Publication Date: 2009-01-08
AMO DEVMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These are the longest and thought to be the most dangerous step in the procedure due to the mechanical manipulation and the use of pulses of ultrasound that may lead to inadvertent ruptures of the posterior lens capsule, posterior dislocation of lens fragments, and potential damage anteriorly to the corneal endothelium and / or iris and other delicate intraocular structures.
These are all subject to the usual complications associated with delicate intraocular maneuvers.

Method used

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  • Method for patterned plasma-mediated modification of the crystalline lens
  • Method for patterned plasma-mediated modification of the crystalline lens
  • Method for patterned plasma-mediated modification of the crystalline lens

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Embodiment Construction

[0028]The present invention can be implemented by a system that projects or scans an optical beam into a patient's eye 68, such as system 2 shown in FIG. 1 which includes an ultrafast (UF) light source 4 (e.g. a femtosecond laser). Using this system, a beam may be scanned in a patient's eye in three dimensions: X, Y, Z. In this embodiment, the UF wavelength can vary between 1010 nm to 1100 nm and the pulse width can vary from 100 fs to 10000 fs. The pulse repetition frequency can also vary from 10 kHz to 250 kHz. Safety limits with regard to unintended damage to non-targeted tissue bound the upper limit with regard to repetition rate and pulse energy; while threshold energy, time to complete the procedure and stability bound the lower limit for pulse energy and repetition rate. The peak power of the focused spot in the eye 68 and specifically within the crystalline lens 69 and anterior capsule of the eye is sufficient to produce optical breakdown and initiate a plasma-mediated ablat...

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Abstract

A method of treating a lens of a patient's eye includes generating a light beam, deflecting the light beam using a scanner to form a treatment pattern of the light beam, delivering the treatment pattern to the lens of a patient's eye to create a plurality of cuts in the lens in the form of the treatment pattern to break the lens up into a plurality of pieces, and removing the lens pieces from the patient's eye. The lens pieces can then be mechanically removed. The light beam can be used to create larger segmenting cuts into the lens, as well as smaller softening cuts that soften the lens for easier removal.

Description

RELATED APPLICATIONS[0001]This application claims the benefit of U.S. Provisional Application No. 60 / 906,944, filed Mar. 13, 2007, and which is incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to ophthalmic surgical procedures and systems.BACKGROUND OF THE INVENTION[0003]Cataract extraction is one of the most commonly performed surgical procedures in the world with estimated 2.5 million cases performed annually in the United States and 9.1 million cases worldwide in 2000. This was expected to increase to approximately 13.3 million estimated global cases in 2006. This market is composed of various segments including intraocular lenses for implantation, viscoelastic polymers to facilitate surgical maneuvers, disposable instrumentation including ultrasonic phacoemulsification tips, tubing, and various knives and forceps. Modern cataract surgery is typically performed using a technique termed phacoemulsification in which an ultrasonic tip with a...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61F9/008
CPCA61F2/16A61F2009/00859A61F2009/00872A61F2009/0088A61F9/009A61F2/1613A61F9/00825A61F2009/0087A61F9/00834A61F2009/00897A61F9/00A61F2220/0016A61F2/1637A61F2/1648A61F2009/00887A61F2002/1683A61F2/1662A61F9/00754A61F9/008A61F2002/16901A61F9/00812
Inventor CULBERTSON, WILLIAMSEIBEL, BARRYFRIEDMAN, NEILSCHULE, GEORGGOODING, PHILIP
Owner AMO DEVMENT
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