Perimeter
US7942528B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 15, 2009 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Sep 15, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/113
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A perimeter has fixation state judging means for individually judging a fixation state of an examinee in connection with each presented stimulus, and the fixation state judging means individually judges the fixation state whenever the stimulus is presented. Even if defective fixation is judged, retest is conducted on only a point where the stimulus was presented, which was judged to be defective fixation. Then, examiner's burden and examinee's burden can be lightened, the test time can be made shorter and test efficiency can be improved in comparison with a case where the whole test is retried from the first as a conventional way.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.