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Process for making silicone intraocular lens with blue light absorption properties

a silicone and intraocular lens technology, applied in the field of silicone intraocular lens making process, can solve the problems of blue light (400-500 nm) being recognized as potentially hazardous to the retina, less popularization of more rigid iol implants in the market, and increased postoperative inciden

Inactive Publication Date: 2005-03-10
BAUSCH & LOMB INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a process for producing soft, foldable, high refractive index, silicone intraocular lenses (IOLs) that can absorb blue light. This is done by coating the semi-finished silicone IOL with a reactive yellow dye solution containing blue light blocking properties. The blue light absorbing IOLs protect the eye's retina from potentially damaging blue light and may provide protection from macular degeneration. The process results in transparent, high elongation, and high refractive index silicone IOLs that are flexible and biocompatible.

Problems solved by technology

Accordingly, more rigid IOL implants have become less popular in the market since larger incisions have been found to be associated with an increased incidence of postoperative complications, such as induced astigmatism.
In recent years, blue light (400-500 nm) has been recognized as being potentially hazardous to the retina.

Method used

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  • Process for making silicone intraocular lens with blue light absorption properties
  • Process for making silicone intraocular lens with blue light absorption properties
  • Process for making silicone intraocular lens with blue light absorption properties

Examples

Experimental program
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Effect test

example 1

Synthesis of N,N-Bis-(2-Hydroxyethyl)-(4-Phenylazo)Aniline (Solvent Yellow 58)

The synthesis of N,N-bis-(2-hydroxyethyl)-(4-phenylazo) aniline is accomplished by coupling the diazonium salt of aniline with N-phenyl diethanolamine. A detailed procedure is also described in D. L. Jinkerson, U.S. Pat. No. 5,470,932, incorporated herein in its entirety by reference.

example 2

Synthesis of N,N-Bis-(2-Allylcarbamatoethyl)-(4′-Phenylazo)Aniline

A 1000-mL 3-neck, round bottom flask connected with a reflux condenser and a drying tube, is charged with 250 mL of methylene chloride, 5.7 grams (0.02 mole) of N,N-bis-(2-hydroxyethyl)-(4-phenylazo)aniline, 3.28 g of allyl isocyanate (0.04 mole) (Aldrich Chemical, Inc., Milwaukee, Wis.) and 0.014 g of dibutyltin dilaurate (Aldrich Chemical). The mixture is heated and refluxed overnight under vigorous stirring. The mixture is then checked with infrared spectroscopy and no residual isocyanate peak is found indicating the reaction is complete. The mixture is concentrated using a rotavapor. High performance liquid chromatography (HPLC) analysis indicates only one major product. The product is then passed through silica gel chromatography to give final purified product with a yield of at least 80 percent. The product is identified by nuclear magnetic resonance (NMR) and Mass Spectroscopy.

example 3

Synthesis of N,N-Bis-(2-Vinylacetoxyethyl)-(4′-Phenylazo)Aniline

A 1000-mL 3-neck, round bottom flask connected with a reflux condenser and a drying tube, is charged with 250 mL of methylene chloride, 5.7 grams (0.02 mole) of N,N-bis-(2-hydroxyethyl)-(4-phenylazo) aniline and 4.04 grams of triethylamine (0.04 mole). The contents are chilled with an ice bath. Through a dropping funnel, 4.18 g (0.04 mole) of vinylacetyl chloride is added into the flask over a period of 30 minutes. The ice bath is then removed and the contents are continuously stirred overnight. The mixture is then filtered and then condensed using a rotavapor. HPLC analysis indicates only one major product. The product is then passed through silica gel chromatography to give a final purified product with a yield of at least 80 percent. The product is identified by NMR and Mass Spectroscopy.

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Abstract

A process for producing silicone intraocular lenses (IOLs) capable of absorbing blue light. Intraocular lenses so produced block blue light from reaching the retina of an eye implanted with the IOL. By blocking blue light from reaching the retina, the IOL thereby prevents potential damage to the retina.

Description

FIELD OF THE INVENTION The present invention relates to a process for making silicone intraocular lenses with blue light absorption properties. More particularly, the present invention relates to a process for reacting a silicone intraocular lens with an ethyleneically unsaturated yellow dye to produce an intraocular lens capable of blocking blue light. BACKGROUND OF THE INVENTION Since the 1940's optical devices in the form of intraocular lens (IOL) implants have been utilized as replacements for diseased or damaged natural ocular lenses. In most cases, an intraocular lens is implanted within an eye at the time of surgically removing the diseased or damaged natural lens, such as for example, in the case of cataracts. For decades, the preferred material for fabricating such intraocular lens implants was poly(methyl methacrylate), which is a rigid, glassy polymer. Softer, more flexible IOL implants have gained in popularity in more recent years due to their ability to be compresse...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61L27/54G02B1/04
CPCA61L27/54A61L2300/442G02B1/043C08L83/04A61L2430/16A61F2/16A61F2/14G02B1/04
Inventor LAI, YU-CHINRUSCIO, DOMINIC V.
Owner BAUSCH & LOMB INC
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