Visual acuity test device and visual acuity test system
US10238280B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2016 |
| Grant date | Mar 26, 2019 |
| Priority date | — |
| Expiry date | Jan 22, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/0219
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A portable visual acuity examination device comprises a mounting unit that can be mounted in front of eyes either using or not using eyeglasses, a visual target displaying unit that uses an organic EL display panel, a display controlling unit that changes the visual target displayed on the displaying unit, an inputting unit for visual target viewing results, and a transmitting unit for measurement results. The portable visual acuity examination device comprises an optical system that can change the distance at which the visual target virtual image is visible. The portable visual acuity examination device detects whether eyeglasses are used and matches an uncorrected vision acuity examination and a corrected vision acuity examination. The portable visual acuity examination device switches between a C-type visual target and an E-type visual target. With data display, both the right and left display units are enabled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.