Visual acuity examination
US11246482B2 · kind B2 · utility
0Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2018 |
| Grant date | Feb 15, 2022 |
| Priority date | — |
| Expiry date | Aug 12, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/40
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A vision screening apparatus conducts a photorefraction ocular screening test to generate refractive error data. Based on the refractive error data, a Snellen equivalent is determined. An evaluated person distance from the vision screening apparatus is also determined and used to generate an adjusted optotype size. The vision screening apparatus displays the optotype, adjusted for the Snellen equivalent and the evaluated person distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.