Glare tester
US5671039A · kind A · utility
12Cited by
6References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 19, 1992 |
| Grant date | Sep 23, 1997 |
| Priority date | — |
| Expiry date | Oct 19, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/06
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A glare tester suitable for use with conventional subjective refractors for testing visual acuity is disclosed. The tester may be fitted to new refractors or retrofitted to existing refractors. The preferred tester is a plastic annular ring with a plurality of LEDs mounted in recesses to direct light toward the test axis and a surface to reflect the LED light toward the patient's eye. A coating on the ring surface opposite the patient's eye improves the LED efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.