Optical Material and Method for Modifying the Refractive Index

a technology applied in the field of optical materials and refractive indexes, can solve the problems that most patients undergoing cataract surgery will not enjoy optimal vision, and achieve the effect of little or no scattering loss

Inactive Publication Date: 2008-01-03
UNIVERSITY OF ROCHESTER
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]The invention is directed to a method for modifying the refractive index of an optical, polymeric material. The method comprises irradiating select regions of the optical, polymeric material

Problems solved by technology

Unfortunately, due to errors in measurement, variable lens positioning or wound healing, most patients undergoing cataract surgery will not enjoy optimal vision without some form of vision correction following the surgery (Brandser et al., Acta Opthalmo

Method used

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  • Optical Material and Method for Modifying the Refractive Index
  • Optical Material and Method for Modifying the Refractive Index
  • Optical Material and Method for Modifying the Refractive Index

Examples

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example 1

Forming Structures in Optical Polymeric Materials

[0089]The optical system described was used to form line structures in select regions of optical materials. Experiments were conducted with three polymeric materials (Bausch & Lomb Incorporated, Rochester, N.Y.): PV2526-164, RD1817, and HEMA B. PV2526-164 is a silicone-containing hydrogel that can absorb about 36% (by total weight). RD1817 is a hydrogel copolymer that comprises about 90% (by weight) N-vinylpyrrolidone (“NVP”) and about 10% (by weight) 4-t-butyl-2-hydroxycyclohexyl methacrylate and that can absorb about 80% (by weight) water. Its refractive index when hydrated is very close to the index of water. HEMA B is poly(2-hydroxyethyl methacrylate) cross-linked with about 0.9% (by weight) of ethylene glycol dimethacrylate (“EGDMA”), also a hydrogel, which can absorb about 37% (by weight) water. The refractive indices of PV2526-164, RD1817, and HEMA B are 1.422, 1.363, and 1.438, respectively, when they are in the hydrated state...

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Abstract

A method for modifying the refractive index of an optical, polymeric material. The method comprises irradiating select regions of the optical, polymeric material with a focused, visible or near-IR laser having a pulse energy from 0.05 nJ to 1000 nJ. The irradiation results in the formation of refractive optical structures, which exhibit little or no scattering loss. The method can be used to modify the refractive index of an intraocular lens following the surgical implantation of the intraocular lens in a human eye. The invention is also directed to an optical device comprising refractive optical structures, which exhibit little or no scattering loss and are characterized by a positive change in refractive index.

Description

[0001]This patent application claims priority to U.S. provisional application Ser. No. 60 / 817,027 filed Jun. 28, 2006.[0002]The present invention relates to a method of using a laser to modify the refractive index of an optical device, and the resulting optical device.BACKGROUND OF THE INVENTION[0003]In general, there are two types of intraocular lenses. One type replaces the eye's natural lens, usually to replace a cataractous lens. The other type is used to supplement an existing lens and functions as a permanent corrective lens. This type of lens (referred to as a phakic IOL) is implanted in the anterior or posterior chamber to correct refractive errors of the eye. In theory, the power for either type of IOL required for enmetropia (i.e., point focus on the retina from light originating at infinity) can be precisely calculated. The power of the implanted lens is selected based on pre-operative measurements of ocular length and corneal curvature to enable the patient to see withou...

Claims

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Application Information

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IPC IPC(8): A61F2/16G02B1/12
CPCA61F2/16A61F9/008A61F9/00834A61F2/1635A61F2009/00897G02C7/04G02C2202/14A61F2009/00842A61F2/1627B29D11/00461B29D11/023A61F2/14A61F2/1624
Inventor KNOX, WAYNE H.DING, LIKUNZLER, JAY FRIEDRICHJANI, DHARMENDRA M.
Owner UNIVERSITY OF ROCHESTER
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