Optometry apparatus and method for subjective measurement using optometric chart
US10251543B2 · kind B2 · utility
2Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2015 |
| Grant date | Apr 9, 2019 |
| Priority date | — |
| Expiry date | Jul 2, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/103
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An optometry apparatus includes an eye chart presentation optical system that presents an optometric chart to an eye to be examined as a subjective eye chart for subjective measurement and a control unit that controls the eye chart presentation optical system to present the optometric chart. The control unit executes an instant presentation of the optometric chart by controlling the eye chart presentation optical system to finish presenting the optometric chart when an instant presentation time has elapsed after starting presenting the optometric chart.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.