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Silicone elastomer-silicone hydrogel hybrid contact lenses

A technology of silicone hydrogel and silicone elastomer, which is applied in the direction of glasses/safety glasses, glasses/goggles, instruments, etc., and can solve problems such as damage, uneven swelling of hydrogel materials, and unsuitability for eyes

Inactive Publication Date: 2018-11-23
COOPERVISION INT HLDG CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Non-swellable materials incorporated into the lens during the curing step, such as electronic components, can cause the hydrogel material to swell unevenly upon hydration, which produces damaged or distorted lenses that are unsuitable for ophthalmic use

Method used

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  • Silicone elastomer-silicone hydrogel hybrid contact lenses
  • Silicone elastomer-silicone hydrogel hybrid contact lenses
  • Silicone elastomer-silicone hydrogel hybrid contact lenses

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0047] Example 1: Dual Cast Molding to Form Silicone Hydrogel Hybrid Silicone Elastomer Contact Lenses

[0048] Approximately 95 uL of silicone elastomer (MED-6015, NuSil) was dispensed into oxygen plasma treated polypropylene female contact lens mold members. A male mold member made from untreated polypropylene was mounted on top of each female mold to provide a first mold assembly which was placed at a temperature set at 100°C 40 minutes in the oven. Upon opening the mold assembly, the partially cured elastomeric lens remains attached to the female mold member. Next, approximately 95uL of the polymerizable silicone hydrogel composition was dispensed into each female mold member on top of the elastomeric lens. The polymerizable composition used was the same composition used to form stenfilcon A (stenfilcon A), enfilcon A (enfilcon A) and comfilcon A (comfilcon A). A male mold member is placed in contact with each of the female mold members containing the cured elastomer an...

example 2

[0049] Example 2: Swellability of silicone elastomers in hydrogel polymerizable compositions

[0050] It is assumed that the Steficonic A polymerizable composition penetrates into the silicone elastomer during curing and forms an interpenetrating polymer network with the silicone elastomer, thereby forming a A bond, which prevents delamination of the two layers during extraction and hydration. To test whether Steficon A penetrates significantly more into silicone elastomers than other hydrogel polymerizable compositions from Example 1, 11.5 mm (diameter) x 100 μm prepared from cured MED6015 was prepared at room temperature The disks were dipped into each of the polymerizable compositions until swelling of the disks was complete (15 minutes up to 24 hours). The disc diameter change was measured and the percent swelling was calculated as percent diameter increase. The results shown in Table 1 indicate that the Stefcon A polymerizable composition swelled MED6015 significantly m...

example 3

[0053] Example 3: Swellability of silicone elastomers in hydrogel monomers

[0054] The same method described in Example 2 was used to further test whether each individual monomer from the Steficon A polymerizable composition could penetrate into the MED6015 disc. Also includes ethanol and ethyl acetate. Ethanol is known not to swell MED6015 significantly, while ethyl acetate is a good solvent for silicone elastomers. The results are shown in Table 2. X22-1622 refers to a siloxane monomer of structure I:

[0055]

[0056] X22-1640 refers to a siloxane monomer of structure II, where m=5-6, n=80-90 and p=7-8

[0057]

[0058] Table 2: MED6015 swelling in liquid monomer

[0059] liquid monomer

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Abstract

A silicone elastomer-silicone hydrogel hybrid contact lens comprises a silicone elastomer layer adhered to silicone hydrogel layer by a delamination-resistant bond. The silicone hydrogel of the silicone hydrogel layer has a percent swell of about -5% up to about 20%. The silicone elastomer layer may have one or more objects embedded within it or adhered to its surface. Such objects may include variable-focus lenses and / or electronic components.

Description

technical field [0001] The field of the invention relates to silicone elastomer-silicone hydrogel hybrid contact lenses and methods for their manufacture. Background technique [0002] Wearable electronics have received a lot of attention in recent years, including electronic contact lenses that contain electronic components that provide additional functionality to the lenses. Various applications of electronic contact lenses have been proposed, such as lenses with glucose sensors for diabetics (see, for example, U.S. Patent No. 8,874,182) and lenses containing electro-active elements with dynamic apertures (see, for example, U.S. Patent No. 8,215,770 No). Electronic lenses have potential applications for correcting vision errors such as myopia control and hyperopia, where a continuous focus range (ie from near to far) is required. [0003] Commercially available contact lenses made from hydrogels are preferred over lenses made from non-hydrogel materials because they are ...

Claims

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Application Information

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IPC IPC(8): G02B1/04
CPCG02B1/043G02C7/049G02C2202/16B29D11/00038B29D11/0073B29D11/00125B29D11/00048B29D11/00826C08L83/04C08L101/14
Inventor 雷切尔·马鲁洛维多利亚·特兰莎拉·陶阿瑟·巴克汉格·勒伊莉莎·伊尔马
Owner COOPERVISION INT HLDG CO
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