# US 2016/0249802 A1 · Eyeball optical measuring instrument, eyeball optical measuring method, and method for irradiating an eyeball and detecting light coming from eyeball

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- Number: US 2016/0249802 A1
- Document ID: US20160249802A1
- Status: Published application
- Kind: A1
- Application number: 15/148,201
- Filed: 2016-05-06
- Published: 2016-09-01
- Earliest claimed: 2014-03-20
- Assignees: Fuji Xerox Co., Ltd.
- Applicants: Fuji Xerox Co., Ltd.
- Inventors: Kazuyuki MATSUSHITA; Kazutaka TAKEDA; Kohei YUKAWA; Hideaki OZAWA; Taku KINOSHITA; Hideo NAKAYAMA
- Web page: https://patentgrep.com/patent/US20160249802A1

## CPC

- A61B 3/117: for examining the anterior chamber or the anterior chamber angle, e.g. gonioscopes
- A61B 3/0025: {characterised by electronic signal processing, e.g. eye models}
- A61B 3/0041: {characterised by display arrangements}
- A61B 3/14: Arrangements specially adapted for eye photography
- A61B 5/14532: {for measuring glucose, e.g. by tissue impedance measurement}
- A61B 5/1455: using optical sensors, e.g. spectral photometrical oximeters
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

An optical measuring instrument 1 is equipped with an optical system 20 to be used for measuring a characteristic of the aqueous humor in the anterior chamber 13 of an eyeball 10 of a measurement subject person and a holding unit 50 which holds the optical system 20 etc. The optical system 20 is equipped with a light emitting system 20A and a photodetecting system 20B. An optical path 28 is set so that light emitted from the light emitting system 20A passes through (traverses) the anterior chamber 13 and is detected by the photodetecting system 20B in a state that the eyeball 10 is turned outward.

## Claims

### Claim 1

An eyeball optical measuring instrument comprising:
a light emission unit that emits light toward an anterior chamber of an eyeball of a measurement subject person;
a photodetection unit that detects the light that has passed through aqueous humor in the anterior chamber; and
a holding unit that holds the light emission unit and the photodetection unit at such positions that the light emitted from the light emission unit passes through the anterior chamber and is detected by the photodetection unit in a state that the eyeball is turned outward.

### Claim 2 (depends on 1)

The eyeball optical measuring instrument according to claim 1, wherein the holding unit holds the light emission unit and the photodetection unit in such a manner that at least one of them is placed outside a region where the eyeball is exposed.

### Claim 3 (depends on 1)

The eyeball optical measuring instrument according to claim 1, wherein the holding unit holds the light emission unit and the photodetection unit in such a manner that both of them are placed outside a region where the eyeball is exposed.

### Claim 4 (depends on 1)

The eyeball optical measuring instrument according to claim 1, wherein the holding unit holds the light emission unit and the photodetection unit so that one of the light emission unit and the photodetection unit placed on an internal canthus side of the eyeball is located on a front side, in a front-rear direction respective to the eyeball, of other of the light emission unit and the photodetection unit placed on an external canthus side of the eyeball.

### Claim 5

An eyeball optical measuring method comprising:
causing light to pass through an anterior chamber of an eyeball of a measurement subject person in such a manner as to traverse the anterior chamber in a state that the eyeball is turned outward; and
detecting the light that has passed through aqueous humor in the anterior chamber.

### Claim 6

A method for irradiating an eyeball and detecting light coming from the eyeball, comprising:
shining light on an anterior chamber of an eyeball in a state that the eyeball is turned outward; and
detecting the light that exits the eyeball after traversing the anterior chamber.