Apparatus for testing color vision
US5297559A · kind A · utility
11Cited by
8References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 13, 1992 |
| Grant date | Mar 29, 1994 |
| Priority date | — |
| Expiry date | Oct 13, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/066
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An opaque plate is positioned in front of a patient undergoing color vision testing. A number of openings are formed in the plate. Behind each disk is a hollow sphere having colored light sources mounted therein. By selectively energizing the colored light sources in a sphere, a mixture of light is presented at the corresponding transparent disk at a selected intensity. A tester can select one or more spheres to be internally illuminated by color light sources so that the patient is presented with a pattern of selectable color mixtures which checks his color vision.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.