Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1988-09-14
1990-09-25
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
A61B 314
Patent
active
049589253
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.
REFERENCES:
patent: 4102564 (1978-07-01), Michael
Ober Jan K.
Udden Per
Bovernick Rodney B.
Udden Per
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