US 12,402,790 B2
Ophthalmic apparatus, method of controlling the same, and recording medium
Yoko Tatara, Kita-ku (JP); Tatsuo Yamaguchi, Warabi (JP); and Makoto Saika, Nerima-ku (JP)
Assigned to TOPCON CORPORATION, Tokyo (JP)
Filed by TOPCON CORPORATION, Tokyo (JP)
Filed on Jul. 22, 2020, as Appl. No. 16/935,217.
Claims priority of application No. 2019-145923 (JP), filed on Aug. 8, 2019.
Prior Publication US 2021/0038071 A1, Feb. 11, 2021
Int. Cl. A61B 3/10 (2006.01); A61B 3/00 (2006.01); A61B 3/12 (2006.01); G06T 7/00 (2017.01); G06T 11/00 (2006.01)
CPC A61B 3/102 (2013.01) [A61B 3/0041 (2013.01); A61B 3/1225 (2013.01); G06T 7/0012 (2013.01); G06T 11/008 (2013.01); G06T 2207/10101 (2013.01); G06T 2207/30041 (2013.01)] 26 Claims
OG exemplary drawing
 
1. An ophthalmic apparatus that applies optical coherence tomography (OCT) to an eye, comprising:
a display;
an interferometer that includes a measurement arm and a reference arm;
an OCT data generating circuit configured to generate OCT data based on an output from the interferometer;
an optical path length changing unit including an actuator and configured to change at least one of an optical path length of the measurement arm and an optical path length of the reference arm; and
a processing circuit configured to control the optical path length changing unit to display the OCT data in an image frame on the display such that a first portion of the OCT data corresponding to a predetermined part of the eye is displayed at a depth level in the image frame set based on a line length of a B-scan in the OCT data and based on a predetermined ocular parameter value including at least one of an axial length and an optical power,
wherein the processing circuit controls the optical path length changing unit to display the OCT data in the image frame on the display such that the first portion of the OCT data is displayed at the depth level in the image frame set based on the line length of the B-scan, based on association between line lengths of B-scans and depth levels, and based on the predetermined ocular parameter value including at least one of the axial length and the optical power, wherein the line lengths of the B-scans and the depth levels in the association are set such that the depth levels increase as the line lengths become longer.