Visual electrophysiology device
US9492098B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2014 |
| Grant date | Nov 15, 2016 |
| Priority date | — |
| Expiry date | Jan 28, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/043
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
To assess visual system function, a device monitors electrical response to a visual stimulus. Stimulus generation includes controlling the timing of component flashes comprising the visual stimulus and modulating the timing between the visual stimulus and other device operations, including image acquisition and infrared flashes. Other stimulus generation includes controlling retinal illumination for sinusoidal, triangular, and square stimuli as well as nonlinear adjustments of stimulus luminance as a function of pupil area. Ease of use improvements includes operation with electrode arrays. Error condition monitoring includes determining the presence of: an eye's pupil; impedance between electrodes that monitor the electrical response; and undesirable levels of external light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.