Ophthalmic devices having a highly selective violet light transmissive filter and related methods
US7278737B2 · kind B2 · utility
76Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2005 |
| Grant date | Oct 9, 2007 |
| Priority date | — |
| Expiry date | Nov 16, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2/1659
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Ophthalmic devices are provided having a violet-light vertical cut-off filter abruptly absorbs light between the wave lengths of between approximately and 400 nm and 450 nm such that a curve when plotted as percent transmission versus wavelength has the shape as depicted in FIG. 2. In one embodiment the ophthalmic devices are made from acrylates and the light absorbing compound is an Eastman Yellow 035 MA dye.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.