Optometry apparatus and optometry program

Patent metadata

Field	Value
Publication number	US-10470658-B2
Application number	US-201715710202-A
Country	US
Kind code	B2
Filing date	Sep 20, 2017
Priority date	Sep 21, 2016
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

Abstract

An optometry apparatus includes: an optical characteristic measurement device configured to measure an optical characteristic of right and left subject eyes in a both-eye opened state by projecting a visual target onto the subject eyes; an anterior ocular segment acquisition device configured to acquire anterior ocular segment images of the right and left subject eyes by the optical characteristic measurement device during the measurement of the optical characteristic of the subject eye in the both-eye opened state; and a controller configured to execute: an analysis instruction for performing analysis processing on the anterior ocular segment images acquired by the anterior ocular segment acquisition device to acquire both-eye opened state information; a determination instruction for determining whether the both-eye opened state information acquired by the analysis instruction is favorable or not, to acquire determination information; and an output instruction for outputting the determination information acquired by the determination instruction.

First claim

What is claimed is:

1. An optometry apparatus comprising:
an optical characteristic measurement device configured to measure refractive power of right and left subject eyes in a both-eye opened state by projecting a visual target onto the subject eyes;
an anterior ocular segment acquisition device configured to acquire anterior ocular segment images of the right and left subject eyes by the optical characteristic measurement device during the measurement of the refractive power of the subject eyes in the both-eye opened state; and
a controller configured to execute:
an analysis instruction for performing analysis processing on the anterior ocular segment images acquired by the anterior ocular segment acquisition device to acquire both-eye opened state information for confirming a fusion state of the subject eyes in the both-eye opened state;
a determination instruction for determining whether the both-eye opened state information acquired by the analysis instruction is favorable or not, to acquire determination information; and
an output instruction for outputting the determination information acquired by the determination instruction.

2. The optometry apparatus according to claim 1 ,
wherein the analysis instruction detects pupil positions of each of the right and left subject eyes by performing analysis processing on the anterior ocular segment images, and acquires the both-eye opened state information based on the pupil positions.

3. The optometry apparatus according to claim 1 , wherein the controller executes a distance changing instruction for changing a presenting distance of the visual target to the right and left subject eyes by the optical characteristic measurement device,
wherein in a case where the presenting distance is changed according to the distance changing instruction, the anterior ocular segment acquisition instruction causes the optometry apparatus to acquire the anterior ocular segment images during the measurement of the refractive power of the subject eyes in the both-eye opened state in the changed presenting distance, and
wherein the analysis instruction causes the optometry apparatus to perform the analysis processing on the anterior ocular segment images in the changed presenting distance, and acquires the both-eye opened state information in the changed presenting distance.

4. The optometry apparatus according to claim 1 , wherein the determination instruction causes the optometry apparatus to change reference data for determining whether the both-eye opened state information is favorable or not, in accordance with a presenting distance of the visual target to the right and left subject eyes.

5. The optometry apparatus according to claim 1 , wherein the optical characteristic measurement device includes a subjective measurement device including a correction optical system which is disposed in an optical path of a light projecting optical system projecting a visual target luminous flux toward the subject eye and changes an optical characteristic of the visual target luminous flux, and subjectively measuring the refractive power of the subject eyes.

6. The optometry apparatus according to claim 1 , wherein the optical characteristic measurement device includes an objective measurement device configured to objectively measure the refractive power of the subject eyes, the objective measurement device including a measurement optical system configured to emit measurement light to a fundus of the subject eye and receives reflected light thereof.

7. The optometry apparatus according to claim 5 , wherein
the light projecting optical system includes a right eye light projecting optical system and a left eye light projecting optical system which are respectively provided as a pair on right and left sides, and emits the visual target luminous flux toward the subject eye to project the visual target onto the subject eye,
the correction optical system includes a right eye correction optical system and a left eye correction optical system which are respectively provided as a pair on right and left sides, is disposed in the optical path of the light projecting optical system, and changes the optical characteristic of the visual target luminous flux,
the controller controls the optometry apparatus to emit a visual target luminous flux from one of the right eye light projecting optical system and the left eye light projecting optical system, projects a first visual target onto one of the right and left subject eyes, emit a visual target luminous flux from the other of the right eye light projecting optical system and the left eye light projecting optical system, and projects a second visual target onto the other of the right and left subject eyes,
the first visual target includes an examination visual target and a first background visual target, and
the second visual target includes a second background visual target having the same pattern as that of the first background visual target.

8. The optometry apparatus according to claim 7 , wherein
the first visual target includes a first fusion visual target, and
the second visual target includes a second fusion visual target having the same pattern as that of the first fusion visual target.

9. The optometry apparatus according to claim 8 , wherein the controller changes the first fusion visual target and the second fusion visual target in a case where a change signal is received.

10. The optometry apparatus according to claim 9 , wherein the controller executes a change signal output instruction for outputting the change signal in a case where the examination visual target is changed.

11. The optometry apparatus according to claim 8 , wherein the first fusion visual target is configured to have a frame shape so as to surround the examination visual target.

12. The optometry apparatus according to claim 1 , wherein the controller executes the determination instruction by comparing the acquired both eye opened state information and reference data.

13. An optometry apparatus configured to subjectively measure an optical characteristic of a subject eye, the optometry apparatus comprising:
a light projecting optical system that includes a right eye light projecting optical system and a left eye light projecting optical system which are respectively provided as a pair on right and left sides, and projects a visual target onto the subject eyes by emitting a visual target luminous flux toward the subject eyes;
a correction optical system that includes a right eye correction optical system and a left eye correction optical system which are respectively provided as a pair on right and left sides, is disposed in an optical path of the light projecting optical system, and changes an optical characteristic of the visual target luminous flux; and
a controller for controlling the light projection optical system to emit a visual target luminous flux from one 1 of the right eye light projecting optical system and the left eye light projecting optical system, project a first visual target onto one of the right and left subject eyes, emit a visual target luminous flux from the other of the right eye light projecting optical system and the left eye light projecting optical system, and project a second visual target onto the other of the right and left subject eyes,
wherein the first visual target includes an examination visual target and a first background visual target,
wherein the second visual target includes a second background visual target having the same pattern as that of the first background visual target;
wherein the first visual target includes a first fusion visual target, and
the second v

Assignees

• Nidek Kk

Inventors

• Takii Michihiro
• Kawai Noriji
• Horino Taeko
• Ochi Hisashi
• Shibata Kazunori

Classifications

• A61B3/111

  for measuring interpupillary distance · CPC title

• A61B3/0091

  Fixation targets for viewing direction · CPC title

• A61B3/0025 Primary

  characterised by electronic signal processing, e.g. eye models · CPC title

• A61B3/18 Primary

  Arrangement of plural eye-testing or -examining apparatus · CPC title

• A61B3/14

  Arrangements specially adapted for eye photography · CPC title