Apparatus and method for testing visual sensitivity to glare
US4800404A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1986 |
| Grant date | Jan 24, 1989 |
| Priority date | — |
| Expiry date | Sep 22, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/06
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Glare testing apparatus enclosed in a housing includes multiple discrete light sources for creating a glare condition in the field of view from an individual being tested to a target, and provision is made for selecting the location or locations of active glare sources, which includes a centrally located source of headlight glare, and a plurality of peripheral sources which can be energized selectively or collectively. Provision is also made for adjusting target luminance, glare intensity and the apparent distance between the target and the eye position in order to test near and far visual acuity under varied conditions of luminance and glare.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.