US 12,245,809 B2
Optometry device for testing an individual's eye and associated method
Stéphane Boutinon, Charenton-le-Pont (FR); Léonard Hartmann, Charenton-le-Pont (FR); Bernard Brechemier, Charenton-le-Pont (FR); and Mai-Lan Boytard, Charenton-le-Pont (FR)
Assigned to Essilor International, Charenton-le-Pont (FR)
Appl. No. 17/440,044
Filed by Essilor International, Charenton-le-Pont (FR)
PCT Filed Mar. 20, 2020, PCT No. PCT/EP2020/057863
§ 371(c)(1), (2) Date Sep. 16, 2021,
PCT Pub. No. WO2020/188104, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 19305342 (EP), filed on Mar. 20, 2019.
Prior Publication US 2022/0142470 A1, May 12, 2022
Int. Cl. A61B 3/032 (2006.01); A61B 3/00 (2006.01)
CPC A61B 3/032 (2013.01) [A61B 3/0041 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optometry device for testing an eye of an individual, the device comprising:
a refraction test unit having an optical system for providing different vision correction powers close to the eye of the individual, and
a display to produce a visual test image for the eye of the individual, said visual test image being visible through an exit aperture of test unit of the optometry device,
the display comprising:
a screen to display a test picture used in producing said visual test image; and
at least one optical element having an optical power, and
said at least one optical element presenting an active state in which the at least one optical element exhibits a non-zero refraction power and is placed on an optical path of the light emitted by said screen and exiting the device through said exit aperture, and an inactive state in which the at least one optical element introduces no refractive power on said optical path, in order for the visual test image to be produced at a variable distance from said exit aperture.