US 12,029,485 B2
Ophthalmic microscope
Yasufumi Fukuma, Tokyo (JP); and Kazuhiro Oomori, Tokyo (JP)
Assigned to TOPCON CORPORATION, Tokyo (JP)
Appl. No. 16/642,052
Filed by Topcon Corporation, Tokyo (JP)
PCT Filed Aug. 28, 2018, PCT No. PCT/JP2018/031844
§ 371(c)(1), (2) Date Nov. 20, 2020,
PCT Pub. No. WO2019/044861, PCT Pub. Date Mar. 7, 2019.
Claims priority of application No. 2017-165187 (JP), filed on Aug. 30, 2017; application No. 2017-167793 (JP), filed on Aug. 31, 2017; and application No. 2018-090269 (JP), filed on May 8, 2018.
Prior Publication US 2021/0068654 A1, Mar. 11, 2021
Int. Cl. A61B 3/117 (2006.01); A61B 3/10 (2006.01); A61B 3/13 (2006.01)
CPC A61B 3/117 (2013.01) [A61B 3/102 (2013.01); A61B 3/132 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An ophthalmic microscope with a function of switchably performing anterior ocular segment observation and posterior ocular segment observation with respect to a subject eye, comprising:
an observation optical system having a first focal point in front of the subject eye;
an objective auxiliary lens configured to be capable of being set in a position on the subject eye side of an objective lens in the observation optical system or on a side opposite to the subject eye side, or capable of being released from the position, a focal point at a time when the objective auxiliary lens is set being set to a second focal point which is an anterior ocular segment position of the subject eye;
a front lens configured to be capable of being set in a position further toward the subject eye side than the first focal point or being released from the position, a focal point through a crystalline lens of the subject eye at a time when the front lens is set being set to a third focal point which is a posterior ocular segment position of the subject eye, and
an OCT measurement optical system, the OCT measurement optical system including an OCT measurement optical system objective lens,
wherein the objective auxiliary lens is set and the front lens is released during the anterior ocular segment observation, without changing a positional relationship between the objective lens and the subject eye,
wherein the front lens is set and the objective auxiliary lens is released during the posterior ocular segment observation, without changing the positional relationship between the objective lens and the subject eye,
wherein the observation optical system includes the objective lens having such a shaped that a part of a circular lens is cut off,
wherein the OCT measurement optical system includes the OCT measurement optical system objective lens which is disposed in the cut-off part of the objective lens, has a first focal point in front of the subject eye, and is configured such that an optical path of OCT measurement light passes through the objective auxiliary lens,
wherein when the objective auxiliary lens is set and the front lens is released, a focal point is set to a second focal point which is an anterior ocular segment position of the subject eye, and OCT measurement of the anterior ocular segment is performed, and
wherein when the front lens is set and the objective auxiliary lens is released, a focal point is set to a third focal point which is a posterior ocular segment position of the subject eye, and OCT measurement of the posterior ocular segment is performed.