US 12,171,492 B2
Ophthalmologic apparatus and measurement method using the same
Tomohiro Sakurada, Tokyo (JP); and Akira Mizuno, Tokyo (JP)
Assigned to TOPCON CORPORATION, Tokyo (JP)
Filed by TOPCON CORPORATION, Tokyo (JP)
Filed on Sep. 24, 2021, as Appl. No. 17/484,390.
Claims priority of provisional application 63/191,575, filed on May 21, 2021.
Prior Publication US 2022/0369921 A1, Nov. 24, 2022
Int. Cl. A61B 3/00 (2006.01); A61B 3/028 (2006.01)
CPC A61B 3/0091 (2013.01) [A61B 3/0025 (2013.01); A61B 3/0033 (2013.01); A61B 3/0041 (2013.01); A61B 3/0285 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An ophthalmologic apparatus comprising:
a visual target projection system that is configured to present a visual target to a subject eye under a presentation condition; and
a controller,
wherein:
the controller is configured to control the visual target projection system to present the visual target at a first examination distance for a far-point examination of the subject eye, a second examination distance for a near-point examination of the subject eye, and a third examination distance that is different from the first examination distance and the second examination distance;
the visual target projection system comprises a focusing lens; and
the visual target projection system is configured to change the examination distance from the presentation position of the visual target to the subject eye among the first examination distance, the second examination distance and the third examination distance by moving the focusing lens forward and backward along an optical axis.