Device for testing the visual behavior of a person, and method for determining at least one optical design parameter of an ophthalmic lens using such a device
AssigneeEssilor International
InventorsGuilhem Escalier, Isabelle Poulain, Benjamin Rousseau
Life of this patent
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Abstract
A device for testing visual behavior of a person, including: an active display configured to display at least one visually predominant target in a plurality of positions that are variable over time and that are aligned along at least one line or column, and a unit for controlling the display. The unit is programmed so that consecutive display positions of the target follow, over time, a visual tracking protocol.
Claims21
A device for testing visual behavior of an individual, comprising:
- an active display configured to display at least one visually predominant target in a plurality of positions that vary over time and that are aligned in at least one row or one column;
- and
- circuitry configured to control the display so that successively displayed positions of the target follow, over time, a visual tracking protocol,
- wherein the visually predominant target is designed to catch the eye of the individual following said target over the course of an eye test,
- wherein said visual tracking protocol corresponds to succession, over time, of positions adopted by the visually predominant target, and
- wherein the circuitry is further configured to impose, by the target, said visual tracking protocol on the individual successively looking in a plurality of particular desired directions that are each associated with a particular displayed position adopted by the target.
A method for determining at least one optical parameter for designing an ophthalmic lens mountable in a frame for an individual, depending on visual behavior of the individual, the method using a testing device for testing visual behavior of the individual, including an active display configured to display at least one visually predominant target in a plurality of positions that vary over time and that are aligned in at least one row or one column, and circuitry configured to control the display so that successively displayed positions of the target follow, over time, a visual tracking protocol, wherein the visually predominant target is designed to catch the eye of the individual following said target over the course of an eye test, wherein said visual tracking protocol corresponds to succession, over time, of positions adopted by the visually predominant target, and wherein the circuitry is further configured to impose, by the target, said visual tracking protocol on the individual successively looking in a plurality of particular desired directions that are each associated with a particular displayed position adopted by the target and comprising:
- a) instructing the individual to perform a visual task in which the individual looks at the target displayed by the display of the display device, positions of the target being predetermined in a frame of reference attached to an image-capturing apparatus;
- b) capturing images of the head of the individual looking at the target by the image-capturing apparatus, each image corresponding to a predetermined position of the target;
- c) determining, on the basis of at least some of the images of the head of the individual, positions of the head of the individual in a frame of reference attached to the image-capturing apparatus or gaze directions of the individual in a frame of reference attached to the head of the individual, each position of the head or gaze direction of the individual being associated with the position of the target for which the corresponding image of the head of the individual was captured;
- and
- d) determining an optical design parameter from the cephalic positions or gaze direction of the individual.
Dependencies are inferred from the claim text.