Vision test device
US11445903B2 · kind B2 · utility
0Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2018 |
| Grant date | Sep 20, 2022 |
| Priority date | — |
| Expiry date | Jun 30, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/1025
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Provided is a vision test device including: a projection unit 10 that projects an image on a retina of a subject with use of a laser beam 50 by two-dimensionally scanning the laser beam; a beam diameter setting unit that sets a beam diameter of the laser beam; and a numerical aperture setting unit that sets a numerical aperture of the laser beam, wherein the projection unit projects, on the retina, a test image for measuring visual information of the subject with use of a laser beam having the set beam diameter and the set numerical aperture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.