Method of evaluating quality of vision in examinee's eye and storage medium

Patent metadata

Field	Value
Publication number	US-9775507-B2
Application number	US-201514876280-A
Country	US
Kind code	B2
Filing date	Oct 6, 2015
Priority date	Oct 7, 2014
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

An ophthalmic apparatus obtains naked-eye wavefront aberration data of an examinee's eye measured by an aberration measuring unit, and calculates first corrected wavefront aberration data intended for a prescription with a first correction power based on the naked-eye wavefront aberration data and the first correction power and generates a first evaluation index based on the first corrected wavefront aberration data. The ophthalmic apparatus further calculates second corrected wavefront aberration data intended for a prescription with a second correction power different from the first correction power in at least one of spherical power, astigmatic power, and astigmatic axis angle based on the naked-eye wavefront aberration data and the second correction power, and generates a second evaluation index based on the second corrected wavefront aberration data. The ophthalmic apparatus then displays the first and second evaluation indexes selectively or in parallel on a monitor.

First claim

What is claimed is:

1. A method of evaluating quality of vision in an examinee's eye, comprising:
an aberration data obtaining step of obtaining naked-eye wavefront aberration data of the examinee's eye measured by an ocular aberrometer;
a first evaluation index generating step of: calculating, based on the naked-eye wavefront aberration data and a first correction power, first corrected wavefront aberration data of the examinee's eye intended for a prescription with the first correction power; and generating a first evaluation index based on the first corrected wavefront aberration data, the first evaluation index representing the quality of vision in the examinee's eye intended for the prescription with the first correction power;
a second evaluation index generating step of: calculating, based on the naked-eye wavefront aberration data and a second correction power, second corrected wavefront aberration data of the examinee's eye intended for a prescription with the second correction power, the second correction power being different from the first correction power in at least one component of spherical power (S), astigmatic power (C), and astigmatic axis angle (A); and generating a second evaluation index based on the second corrected wavefront aberration data, the second evaluation index representing the quality of vision in the examinee's eye intended for the prescription with the second correction power; and
a display control step of displaying the first evaluation index and the second evaluation index selectively or in parallel on a monitor.

2. The method of evaluating quality of vision in an examinee's eye according to claim 1 ,
wherein the second evaluation index generating step includes generating the second evaluation index corresponding to each of two or more different second correction powers, and
wherein the display control step includes displaying the respective second evaluation indexes separately or in parallel on the monitor.

3. The method of evaluating quality of vision in an examinee's eye according to claim 2 ,
wherein the second evaluation index generating step includes setting, as the second correction powers, a plus second correction power corresponding to a correction power in which at least one component of the S, C, and A is increased by a predetermined amount with respect to the first correction power and a minus second correction power corresponding to a correction power in which at least one component of the S, C, and A is decreased by a predetermined amount with respect to the first correction power, and
the second evaluation index based on the plus second correction power and the second evaluation index based on the minus second correction power are separately generated.

4. The method of evaluating quality of vision in an examinee's eye according to claim 3 , wherein the second evaluation index generating step includes setting, as the second correction powers, a plus second correction power corresponding to a correction power in which an astigmatic axis angle is rotated by a predetermined amount in a positive direction with respect to the first correction power, and a minus second correction power corresponding to a correction power in which an astigmatic axis angle is rotated by a predetermined amount in a negative direction with respect to the first correction power, and generating the respective second evaluation indexes.

5. The method of evaluating quality of vision in an examinee's eye according to claim 1 , further comprising a condition obtaining step of obtaining an examination condition based on an operation signal input to an input interface, the examination condition being set in a subjective optometric device configured to switch refractive power of an optical member to be placed in front of the examinee's eye to subjectively measure a correction power of the examinee's eye, and
wherein the first evaluation index generating step includes applying the examination condition to the first correction power to generate the first evaluation index, and updating the first evaluation index in sync with a change in the examination condition by the input interface.

6. The method of evaluating quality of vision in an examinee's eye according to claim 4 , wherein the second evaluation index generating step includes applying a correction power, in which a predetermined SCA component is added to the examination condition, to the second correction power to generate the second evaluation index, and updating the second evaluation index in sync with a change in the examination condition by the input interface.

7. The method of evaluating quality of vision in an examinee's eye according to claim 1 ,
wherein the first evaluation index generating step includes applying an objective eye refractive value (a REF value) based on the naked-eye wavefront aberration data to the first correction power to generate the first evaluation index, and
wherein the second evaluation index generating step includes applying a correction power, in which a predetermined SCA component is added to the objective eye refractive power, to the second correction power to generate the second evaluation index.

8. A method of evaluating quality of vision in an examinee's eye, comprising:
an aberration data obtaining step of obtaining naked-eye wavefront aberration data of an examinee's eye measured by an ocular aberrometer;
a condition obtaining step of obtaining an examination condition based on an operation signal input to an input interface, the examination condition being set in a subjective optometric device configured to switch a position of an optical member to be placed in front of the examinee's eye to subjectively measure a correction power of the examinee's eye; and
an evaluation index generating step of: calculating, based on the naked-eye wavefront aberration data and a correction power, corrected wavefront aberration data of the examinee's eye intended for a prescription with the correction power corresponding to the examination condition by use of the naked-eye wavefront aberration data; and generating an evaluation index based on the corrected wavefront aberration data, the evaluation index representing the quality of vision in the examinee's eye intended for the prescription with the correction power, and
the evaluation index generating step including updating the evaluation index in sync with a change in the examination condition by the input interface.

9. The method of evaluating quality of vision in an examinee's eye according to claim 8 , the method being to be executed by an ophthalmic apparatus provided with a switching unit configured to switch an optical member to be placed in front of the examinee's eye, and a controller including a display part configured to display the evaluation index, and the input interface.

10. A storage medium storing an ophthalmic measurement program to simulate an evaluation index representing quality of vision in an examinee's eye,
wherein the ophthalmic measurement program is executed by a processor of an ophthalmic apparatus to cause the ophthalmic apparatus to perform:
an aberration data obtaining step of obtaining naked-eye wavefront aberration data of the examinee's eye;
a first evaluation index generating step of: calculating, based on the naked-eye wavefront aberration data and a first correction power, first corrected wavefront aberration data of the examinee's eye intended for a prescription with the first correction power; and generating a first evaluation index based on the first corrected wavefront aberration data, the first evaluation index representing the quality of vision in the examinee's eye intended for the prescription with the first correction pow

Assignees

• Nidek Kk

Inventors

• Shimizu Kazunari

Classifications

• A61B3/0033

  characterised by user input arrangements · CPC title

• A61B3/103

  for determining refraction, e.g. refractometers, skiascopes · CPC title

• A61B3/04

  Trial frames; Sets of lenses for use therewith · CPC title

• A61B3/1015

  for wavefront analysis · CPC title

• A61B3/0025 Primary

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