Eye movement measurement device with multiple light emitting and detecting elements
US4958925A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1988 |
| Grant date | Sep 25, 1990 |
| Priority date | — |
| Expiry date | Sep 14, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/152
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In a device for measuring the movements of a person's eye there are one or more sets of cooperating light detecting elements and light emitting elements intended primarily for measuring in chosen selected directions. Each set could consist of two light detecting elements located at a distance on each side of the eye and symmetrically with respect to the eye and in a symmetry plane of the eye containing the direction chosen. The associated light emitting elements are located, also symmetrically, in a plane substantially orthogonal to the plane with the light detecting elements. When many sets of cooperating light emitting and detecting elements of this kind are combined into a symmetrical or semisymmetrical arrangement, this permits selecting, for an eye movement in a given direction, the most suitable set for detecting the eye movement in this direction. Only one set of light emitting elements, assigned to the axis of measurement, is active at a time. For measuring the eye movement along two or more axes the related emitting elements are activated alternately in a repetitive sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.