Contact lens manufacturing method
US-2019217561-A1 · Jul 18, 2019 · US
Apparatuses and methods for multistage molding of lenses
US11794427B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11794427-B2 |
| Application number | US-202117382654-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 22, 2021 |
| Priority date | Nov 6, 2019 |
| Publication date | Oct 24, 2023 |
| Grant date | Oct 24, 2023 |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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Abstract
Official abstract text for this publication.
Apparatuses and methods for multistage molding of contact lenses containing low oxygen permeable components or oxygen impermeable components. Components may be embedded within a contact lens by forming a device on a polymer substrate, molding a spacer onto a male mold, bonding the device to the spacer, removing the polymer substrate, and molding the remainder of the contact lens.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of forming a contact lens, the method comprising: providing a component; providing an insert; forming a spacer by molding the component and insert together in a single first molding stage; and forming a lens body around the component, the insert, and the spacer in a second molding stage; wherein the component or at least one subcomponent of the component is lower in oxygen permeability than the lens body around the component. 2. The method of claim 1 , wherein the insert comprises polydimethylsiloxane or a low expansion hydrogel. 3. The method of claim 1 , wherein the spacer comprises polydimethylsiloxane or a low expansion hydrogel. 4. The method of claim 1 , wherein the lens body comprises polydimethylsiloxane or a low expansion hydrogel. 5. The method of claim 1 , wherein the lens body has an outer diameter, wherein the outer diameter of the lens body is equal to or greater than the outer diameter of the component. 6. The method of claim 1 , wherein the lens body consists of the same material as the insert. 7. The method of claim 1 , wherein the lens body consists of the same material as the spacer. 8. The method of claim 1 , wherein the component comprises multiple subcomponents. 9. The method of claim 1 , wherein the lens body is formed around the component, the insert, and spacer between a male mold and a female mold. 10. A method for forming a contact lens, the method comprising: providing a component; providing an insert; forming a spacer by molding the component and insert together between a male mold and a female mold insert in a single first molding stage; and forming a lens body around the component, the insert, and the spacer between the male mold and a female mold in a second molding stage; wherein the component or at least one subcomponent of the component is lower in oxygen permeability than the lens body around the component. 11. The method of claim 10 , wherein the female mold insert is soft. 12. The method of claim 10 , wherein the female mold insert and the female mold each have an inner diameter, wherein the inner diameter of the female mold insert is less than the inner diameter of the female mold. 13. The method of claim 10 , wherein the insert comprises polydimethylsiloxane or a low expansion hydrogel. 14. The method of claim 10 , wherein the spacer comprises polydimethylsiloxane or a low expansion hydrogel. 15. The method of claim 10 , wherein the lens body comprises polydimethylsiloxane or a low expansion hydrogel. 16. The method of claim 10 , wherein the lens body has an outer diameter, wherein the outer diameter of the lens body is equal to or greater than the outer diameter of the component. 17. The method of claim 10 , wherein the lens body consists of the same material as the insert. 18. The method of claim 10 , wherein the lens body consists of the same material as the spacer. 19. The method of claim 10 , wherein the component comprises multiple subcomponents. 20. The method of claim 10 , wherein the lens body is formed around the component, the insert, and spacer between a male mold and a female mold.
Assignees
Inventors
Classifications
- B29D11/00038Primary
Production of contact lenses · CPC title
Contact lens fitting; Contact lenses for orthokeratology; Contact lenses for specially shaped corneae · CPC title
Contact lenses having special fitting or structural features achieved by special materials or material structures · CPC title
Contact lenses · CPC title
- B29D11/00048Primary
composed of parts with dissimilar composition (B29D11/00057 takes precedence) · CPC title
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Frequently asked questions
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- What does patent US11794427B2 cover?
- Apparatuses and methods for multistage molding of contact lenses containing low oxygen permeable components or oxygen impermeable components. Components may be embedded within a contact lens by forming a device on a polymer substrate, molding a spacer onto a male mold, bonding the device to the spacer, removing the polymer substrate, and molding the remainder of the contact lens.
- Who is the assignee on this patent?
- Innovega Inc
- What technology area does this patent fall under?
- Primary CPC classification B29D11/00038. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Oct 24 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).