Visual apparatus
US4842400A · kind A · utility
89Cited by
2References
14Claims
0Family size
Assignees
Inventor
Key dates
| Filing date | Jul 6, 1988 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | Jul 6, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F9/023
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The visual apparatus makes it possible to limit the instantaneous luminous intensity without reducing the field of vision and comprises a plate with an opaque surface having a transparent slot, a support (2) on which said plate is mounted, said support bearing on part of the body of said person, said plate thus being placed in front of an eye of said person and a scanning means (8) connected to said plate for scanning the opaque surface of said plate by said transparent slot. The apparatus is used more particularly as medical spectacles in the case of cataracts, or as sunglasses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.