High magnification ophthalmic lens
US5189450A · kind A · utility
13Cited by
15References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 21, 1991 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | May 21, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/125
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An ophthalmic lens which has three elements, a contact lens, a center lens, and an entry lens. The lens produces a magnified aerial image of the fundus of the eye. The lens is particularly useful because it provides high magnification and detail of the fundus as well as good stereoscopic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.