Applanation lens and method for ophthalmic surgical...

Surgery – Instruments – Light application

Reexamination Certificate

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C606S004000, C606S166000

Reexamination Certificate

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06899707

ABSTRACT:
An improved applanation lens and method for use in an interface between a patient's eye and a surgical laser system does not discolor or lose light transmittance when subjected to gamma radiation. The improved applanation lens has an applanation surface configured to contact the eye upon application of a pressure. The lens is formed of high purity silicon dioxide (SiO2) with purity great enough to resist discoloration upon prolonged irradiation by high-energy radiation such as UV, x-rays, gamma rays or neutrons, and is preferably a fused silica.

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patent: WO 01/44871 (2001-06-01), None
Edmund Optics ‘Tech Spec for Fused Silica windows, High Performance UV Optics-PCV; High Performance UV Optics-DCV; High Performance UV Optics-DCX; and High Performance UV Optics-PCX.’ . http://www.edmundoptics.com/onlinecatalog/search/index.cfm.*
Dynasil “Precision Optics Materials Fabrication.” http://www.dynasil.com/.*
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Mitsutoshi Ito, et al.;“Picosecond Laser In Situ Keratomileusis With a 1053-nm Nd: YLF Laser”, Journal of Refractive Surgery vol. 12 Sep./Oct. 1996.
Specifications on Lens Material from Dynasil Website, available at least as early as May 19, 2001.
Marketing Materials for Fused Silica.
Information on the Optical Properties of Dynasil Synthetic Fused Silica, available at least as early as May 30, 2001.

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