Contact lenses with surfaces having different softness
US12429712B2 · kind B2 · utility
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1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2024 |
| Grant date | Sep 30, 2025 |
| Priority date | — |
| Expiry date | Jul 18, 2044 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2083/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention is related to a contact lens, especially a SiHy contact lens, which comprises a lens bulk material covered with an outer surface hydrogel layer thereon and has a posterior surface and an opposite anterior surface. The outer surface hydrogel layer consists of an anterior outer hydrogel layer and a posterior outer hydrogel layer. A contact lens of the invention is characterized by having a difference in surface softness between its posterior (BC) and anterior (FC) surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.