Treatment of presbyopia and other eye disorders using a scanning laser system

a scanning laser and presbyopic technology, applied in the field of presbyopic treatment and the treatment and prevention of glaucoma using dual, can solve the problems of inability to present details or practical methods or laser parameters for presbyopic correction, mechanical approaches have drawbacks of complexity and time consumption, and prior art laser parameters do not present details or practical methods for presbyopic correction, so as to prevent bleeding, effectively ablate the sclera tissue, and prevent the bleeding
USRE40002E1Inactive Publication Date: 2008-01-15SURGILIGHT
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
SURGILIGHT
Publication Date
2008-01-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

Presbyopia is treated by a method which uses ablative lasers to ablate the sclera tissue and increase the accommodation of the ciliary body. Tissue bleeding is prevented by an ablative laser having a wavelength of between 0.15 and 3.2 micron. A scanning system is proposed to perform various patterns on the sclera area of the cornea to treat presbyopia and to prevent other eye disorder such as glaucoma. Laser parameters are determined for accurate sclera expansion.REEXAMINATION RESULTSThe questions raised in reexamination request no. 90 / 006,090, filed Aug. 22, 2001, have been considered and the results thereof are reflected in this reissue patent which constitutes the reexamination certificate required by 35 U.S.C. 307 as provided in 37 CFR 1.570(e), for ex parte reexaminations, or the reexamination certificate required by 35 U.S.C. 316 as provided in 37 CFR 1.997(e) for inter partes reexaminations.
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Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to methods and apparatus for the treatment of presbyopia and the treatment and prevention of glaucoma using dual-beam scanning lasers.

[0003] 2. Prior Art

[0004] Corneal reshaping, including a procedure called photorefractive keratectomy (PRK) and a new procedure called laser assisted in situ keratomileusis, or laser intrastroma keratomileusis (LASIK), has been performed by lasers in the ultraviolet (UV) wavelength of 193-213 nm. Commercial UV refractive lasers include ArF excimer lasers at 193 nm and other non-excimer, solid-state lasers, such as the one patented by the present inventor in 1992 (U.S. Pat. No. 5,144,630). Precise, stable corneal reshaping requires lasers with strong tissue absorption (or minimum penetration depth) such that the thermal damage zone is at a minimum (less than few microns). Furthermore, accuracy of the procedure of vision correction depends on the amount of tissue...

Claims

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