Oxygen permeable scleral contact lenses with thick payloads
US11150493B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 21, 2019 |
| Grant date | Oct 19, 2021 |
| Priority date | — |
| Expiry date | Jul 8, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/16
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A contact lens has a core that is thick enough to accommodate a payload. The core has a base surface for mounting the contact lens to the sclera of the user's eye. It also provides mechanical integrity to carry the payload. The contact lens also includes an outer covering and an inner covering. Each covering is a thin layer of gas-permeable material shaped to form an air gap between the covering and the core. The two air gaps are connected by an air path that traverses the core. Oxygen from an outside environment passes through the gas-permeable outer covering to reach the outer air gap, through the air path to the inner air gap, and through the gas-permeable inner covering to reach the cornea of the wearer's eye.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.