KR20160045216A - Individual-based visual field testing method and device of the same - Google Patents

Abstract

An objective of the present invention is to provide a customized visual field testing method optimized for a testee by dividing a visual field testing into an initial testing and a subsequent testing. The customized visual field testing method according to an embodiment of the present invention includes: a testee information input step for inputting information for executing the visual field testing regarding the testee; an initial testing execution/non-execution determination step for determining an initial testing/subsequent testing based on the information of the testee inputted in the testee information input step; an initial testing step for executing the initial testing in accordance with the determination made in the initial testing execution/non-execution determination step; a customized testing step for executing the subsequent testing in accordance with the determination made in the initial testing execution/non-execution determination step; and a visual field testing result storage step for storing results of the initial visual field testing and subsequent visual field testing.

Description

TECHNICAL FIELD [0001] The present invention relates to a personalized visual field inspection method and apparatus, and more particularly to an INDIVIDUAL-BASED VISUAL FIELD TESTING METHOD AND DEVICE OF THE SAME,

[0001] The present invention relates to a visual field inspection method for diagnosing optic nerve damage disease, and more particularly, to a personalized visual field inspection method and apparatus for applying a visual field inspection method optimized for an individual to a subject

Glaucoma is one of the three major ophthalmologic diseases that gradually narrow the field of view due to optic nerve damage and eventually lead to blindness. Glaucoma can not maintain the current vision through medication or optic nerve surgery because optic nerve regeneration is not available until now, so early screening is very important and continuous treatment and management are required.

The World Glaucoma Association reported that the incidence of glaucoma increased by 0.1% each year since the forties, reaching 10% of the population by the 80s. In addition, the National Health Insurance Corporation announced that the number of domestic glaucoma patients doubled to 400,000 in 2009 compared to 2002, and the number of patients with glaucoma is increasing, and interest in glaucoma is increasing .

Recently, as the public interest in health has increased, studies on glaucoma disease have been promoted and medical technology has developed, the possibility of early detection of optic nerve damage has increased compared to the past. Therefore, early detection of glaucoma through periodic field-of-view tests and prevention of blindness due to glaucoma can be prevented if treatment and management are continued.

Visual field testing is an important clue to assess the function of the optic nerve and to determine the progress and diagnosis of glaucoma. The visual field is a range in which the eye can be seen without looking at a point. The normal range of the normal person is 60 degrees inward, 110 degrees outward, 60 degrees upward and 75 degrees downward. The visual field test checks whether or not the visual field is damaged or not by examining whether or not the examinee confirms the target of various brightness randomly displayed in the visual field measurement area while gazing the gaze fixation target located at the center of the visual field measurement area.

The research on the conventional visual inspection method is roughly classified into the presentation of the initial target brightness, the minimum brightness search of the perceptible target, and the final target brightness determination study. In order to improve the efficiency of the visual field test, the minimum brightness search (SITA, ZEST, Full threshold, MOBS, etc.) has been actively performed. In order to improve the accuracy of the visual field test, it was concluded that some of the final target brightness determination studies have been performed.

However, all studies related to the conventional visual field test methods have been conducted to improve the efficiency and accuracy of the single field of view test, so that effective linkage with the subsequent test is not considered. Thus, an effective visual field in connection with the test results of the testee It was determined that the inspection method was necessary.

In addition, the existing visual field inspection method is inefficient because the visual field inspection can be performed according to the algorithm built in the visual field inspection device and the inspection is performed for the entire visual field including the area where the visual field is not damaged. In addition, the existing visual field test method does not reflect personal preference and cognitive characteristics of the testee, and there is a limitation that the accuracy and fatigue can be increased due to the decrease of the test concentration.

One aspect of the present invention is to provide a personalized visual field inspection method that optimizes the visual field inspection for a testee by dividing the visual inspection into an initial inspection and a subsequent inspection.

Another aspect of the present invention is to provide a personalized visual field inspection method that reflects personal preference and perception characteristics of a subject during a visual field test.

Another aspect of the present invention is to provide a personalized visual field inspection apparatus implementing the personalized visual field inspection method.

The personalized visual field inspection method according to an embodiment of the present invention includes a subject information input step of inputting information for performing a visual field test of a subject to be inspected, a step of inputting information of a subject person inputted in the subject information input step, A first inspection step of performing initial inspection in accordance with the determination of the initial inspection status determination step, a personalized inspection step of performing the subsequent inspection according to the determination of the initial inspection status determination step, And a visual field inspection result storing step of storing the visual field inspection results of the initial inspection and the subsequent inspection.

In the testee information input step, demographic information such as the name, age, sex, inspection plan, and inspection basic information of the testee can be inputted.

The initial examination determining step may determine whether the first test or the next examination is performed by comparing the information of the subject inputted in the subject information input step with the information of the subject information of the visual field examination result storing step.

The initial inspection step may include a damage area inspection step of inspecting a damage area that can not be confirmed by the examinee in the visual field measurement area, a damage degree inspection step of determining whether to damage the damage area, Determining whether a degree of damage of the normal region is to be evaluated in the visual field measurement region, and determining a normal region of the normal region based on the degree of damage, have.

The personalized inspection step may include a test type determination step of determining whether the inspection type of the subject is a damage area inspection, a damage degree inspection, a normal area inspection, or another inspection in the subsequent inspection, Reading the previous visual field inspection result reading the inspection result, and performing a visual field inspection according to the inspection type.

The damaged area inspection step may include a step of presenting a target of average brightness which can be identified by a normal person of the same age range as the subject to the target position presented at regular intervals in the visual field measurement area once, The area can be evaluated as a damaged area.

The brightness of the target applied to the damaged area inspection step may be an average brightness or an arbitrarily set brightness of a normal age group desired by the examinee for each target position.

In the damage degree checking step, the minimum brightness that the examinee can check can be found while changing the brightness of the target with respect to the damaged area.

In the damage degree inspection step, the index presentation position of the damaged area may be adjusted more densely than the index interval of the damaged area inspection step by re-adjusting the index position of the damaged area inspection step while matching the damaged area.

The normal region inspection step can detect the minimum brightness that can be confirmed by the examinee while changing the brightness of the target only for the position of the target identified by the examinee in the damage degree checking step.

In the normal region inspection step, the target presentation position of the normal region can be set to be less than the target interval of the normal region inspection step by rearranging the target position of the normal region inspection step while matching the normal region.

The storing the visual field test result may further include a visual field test result database building step of constructing a visual field test database according to a test order for each test subject.

The other examinations of the examination type determination step may select a target fixation target type, a target position for eye fixation, and a target presentation method for visual field measurement according to the preference of the testee during the visual inspection.

The gaze fixation target type may be at least one of various sizes, shapes, colors, and flicker depending on the preference of the testee so that the testee can concentrate.

The eye fixation target position can be finely adjusted to a position where the subject can comfortably see.

The method of presenting a target for field of view measurement may include any of a method of presenting at a set time interval and a method of presenting at a set time interval after a response of a testee.

The personalized visual field inspection apparatus according to an embodiment of the present invention includes an input unit for inputting information of a person to be examined, an inspection unit for performing an initial inspection or a personalized inspection by determining whether or not the initial inspection is performed according to the input information, And a data storage unit for storing the inspection results.

As described above, according to the embodiment of the present invention, there is an effect of simultaneously improving the efficiency and accuracy of the visual field inspection through the visual field inspection method provided to the personalized inspection step, which is a subsequent inspection after the initial inspection.

In addition, according to the embodiment of the present invention, there is an effect that the visual field test result of an individual subject is tracked and continuously managed, thereby making it possible to use it for evaluation of the degree of damage progression of the optic nerve. Therefore, the visual field test result of individual testee can be useful for managing glaucoma.

1 is a flowchart illustrating a personalized visual field inspection method according to an exemplary embodiment of the present invention.
2 is a detailed flowchart of the first inspection step of the visual field inspection performed by the method of FIG.
FIG. 3 is a detailed flowchart of the personalized inspection step during the visual field inspection performed by the method of FIG.
4 is a state diagram showing a field of view measurement area during a field of view inspection performed by the method of FIG.
FIG. 5 is a graph showing that the brightness of the target is determined as an average of the brightness distribution of the visual field of the normal person during the visual field test performed by the method of FIG.
6 is a state diagram showing that the index presentation position is densely adjusted when the degree of damage is checked by the method of FIG.
FIG. 7 is a state diagram showing that the target position is rarely adjusted when the normal region inspection is performed by the method of FIG.
FIG. 8 is a state diagram showing the type of gaze fixation target during visual field inspection performed by the method of FIG. 1. FIG.
FIG. 9 is a state diagram showing adjustment of the position of eye-sight fixation target during the visual field inspection performed by the method of FIG.
10A and 10B are state diagrams showing a method of presenting a target for field of view measurement in the field of view inspection performed by the method of FIG.
11 is a configuration diagram of a personalized visual field inspection apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

1 is a flowchart illustrating a personalized visual field inspection method according to an exemplary embodiment of the present invention. Referring to FIG. 1, the personalized visual field inspection method according to an exemplary embodiment of the present invention includes a subject information input step S10, an initial examination determination step S20, an initial examination step S31, a personalized inspection step S32, And a result storing step S40.

11 is a configuration diagram of a personalized visual field inspection apparatus according to an embodiment of the present invention. Referring to FIG. 11, the personalized visual field inspection apparatus of FIG. 1 is configured to implement a personalized visual field inspection method.

That is, the personalized visual field inspection apparatus includes an input unit 100 for inputting information of a person to be examined, an inspection unit 200 for determining whether or not the initial inspection is performed according to the inputted information and performing an initial inspection or a personalized inspection, A display unit 300, and a data storage unit 400 for storing inspection results.

In the subject information input step (S10), basic information such as demographic information such as name, sex, and age of the person to be examined and an examination plan is inputted through the user interface.

The initial examination determination step S20 compares the information of the subject inputted in the subject information input step S10 with the information of the storage medium of the visual field examination result storage step S40 to determine whether the subject is an initial examination or a subsequent examination do.

According to the determination of the initial inspection status (S20), the next step (S31, S32) performs the initial inspection step (S31) if it is determined to be the initial inspection, and performs the personalized inspection step (S32) .

2 is a detailed flowchart of the first inspection step of the visual field inspection performed by the method of FIG. Referring to FIG. 2, the initial inspection step S31 includes a damage area inspection step S311, a damage degree inspection step S312, a damage degree inspection step S313, and a normal (S314), a normal area inspection step (S315), and a visual field inspection result storage step (S40).

FIG. 3 is a detailed flowchart of the personalized inspection step during the visual field inspection performed by the method of FIG. Referring to FIG. 3, the personalized examination step S32 includes a test type determination step (S321) of the testee, a previous vision test result reading step (S322) corresponding to the inputted examination method, The input inspection method includes a visual field inspection step S323, and a visual field inspection result storage step S40.

The inspection method in the personalized inspection step S32 includes at least one of the inspection of the first inspection step S31, that is, at least one of the damage area inspection, the damage degree inspection and the normal area inspection or other inspection.

4 is a state diagram showing a field of view measurement area during a field of view inspection performed by the method of FIG. Referring to FIG. 4, the initial inspection step S31 is performed when the determination result of the initial inspection determination step S20 is the initial inspection.

FIG. 5 is a graph showing that the brightness of the target is determined as an average of the brightness distribution of the visual field of the normal person during the visual field test performed by the method of FIG.

4 and 5, in the first inspection step S31, the damaged area inspection step S311 is performed for each of the positions of the targets 11 and 21 presented at regular intervals in the visual field measurement area A, Present a target of average brightness (D) that can be identified by a normal person once. Then, in the visual field measurement area A, an area confirmed by the examinee is evaluated as a normal area C, and an area not confirmed by the testee is evaluated as the damaged area B.

Referring to FIG. 5, in the damaged area inspection step (S311), the user can apply an average brightness that can be determined by a testee at a desired age range or a brightness designated by a testee, in addition to the index of the average brightness (D) have.

The damage degree inspection step S312 determines whether the damage degree is to be evaluated for the damage area B evaluated in the damage area inspection step S311. That is, the damage degree checking step S312 stores the visual field inspection result if the damage degree is less than the set value, and performs the damage degree checking step S313 if the damage degree is over the set value.

Referring to FIG. 2 again, the damage degree checking step S313 is a step of setting the brightness of each target to a set value (for example, 0 to 38 dB) for each position of the target 11 presented at regular intervals with respect to the damaged area B, The user searches for a minimum brightness that can be confirmed by the examinee while changing through a vision measurement algorithm (for example, SITA (Swedish interactive thresholding algorithm, ZEST), zippy estimation of sequential thresholds, full threshold (MOBS)

6 is a state diagram showing that the index presentation position is densely adjusted when the degree of damage is checked by the method of FIG. Referring to FIG. 6, the damage degree checking step S313 may be performed at a densely spaced interval to suit the shape of the damaged area B for more precise inspection in addition to the target 11 presented at regular intervals with respect to the damaged area B The additional target 12 to be presented can be used. The densities of the target 11 and the additional target 12 can be adjusted densely at regular intervals or at irregular intervals.

Referring again to FIG. 2, in the step S314 of determining whether or not the normal region is inspected, when it is inputted that the normal region evaluation is performed according to the result of the damage degree checking step S313, the degree of impairment of the normal region C is evaluated And then inputs the result.

FIG. 7 is a state diagram showing that the target position is rarely adjusted when the normal region inspection is performed by the method of FIG. Referring to FIG. 7, in the normal region inspection step S315, the brightness of each target is set to a set value for each position of the target 21 presented at regular intervals with respect to the normal region C determined by the examinee in the damage degree checking step S313 (For example, SITA, ZEST, Full threshold, MOBS) between 0 to 38 dB (for example, 0 to 38 dB).

The normal region inspection step S315 may include an additional target 22 that is presented at a rare interval so as to be suitable for the shape of the normal region C for more efficient inspection in addition to the target 21 presented at regular intervals with respect to the normal region C ) Can be used. When the spacing between the target 21 and the additional target 22 is rarely adjusted, it can be adjusted rarely or at irregular intervals at regular intervals.

Referring to FIG. 2 again, the field test result storage step S40 stores the evaluation results of the damage area inspection step S311, the damage degree inspection step S313, and the normal area inspection step S315 in a storage medium. The storage medium may be an Internet server, or an independent device such as an HDD, SSD, or USB.

3, the personalized inspection step S32 includes a step S321 of determining the inspection type of the testee, a step S322 of reading the previous visual field inspection result corresponding to the input inspection method, S323), and a visual field test result storage step (S40).

In the inspection type discriminating step (S321), the examinee determines whether the method to be inspected in the subsequent inspection is a damage area inspection, a damage degree inspection, a normal area inspection, or another inspection. In addition, the inspection type discriminating step S321 may be a subsequent inspection but, if desired, the inspection of the damaged area may be performed again.

In the step S322 of reading the previous visual field inspection result, the previous visual field inspection result corresponding to the inspection method input in the inspection type determination step S321 is read from the storage medium.

The field-of-view inspection step S323 performs a field-of-view inspection based on the result of the previous field-of-view inspection of the subject read in the step S322 of reading the previous field-of-view inspection result. The visual field inspection step (S323) presents the minimum target brightness that the examinee has confirmed from the previous field of vision test of the examinee for more efficient visual field examination.

For example, if the examinee finally confirmed the target with a 10dB brightness for a specific visual field at the initial examination, a 10dB bright target or a 10dB bright target is presented for the same visual field in a subsequent examination, It is possible.

The visual field inspection result storage step (S40) constructs the visual field inspection results in the visual field inspection database according to the order of inspection for each subject so that they can be continuously used in the subsequent inspection. That is, the visual field test result of the testee can be tracked and used continuously and can be used effectively in the evaluation of the degree of damage progression of the glaucoma and optic nerve.

FIG. 8 is a state diagram showing the type of gaze fixation target during visual field inspection performed by the method of FIG. 1. FIG. Referring to FIG. 8, in the test type determination step (S321), another test may reflect the testee's preference in the visual field test.

In the test type determination step (S321), the other eyesight fixation target is located at the center of the visual field measurement area, and is a place where the examinee should look for accurate visual field examination, and is used according to the personal preference and perception characteristic of the testee You can choose not only the meaningless point (31) shape but also the eye fixation target with various sizes, shapes, colors and flicker. For example, the gaze fixation target in one embodiment may be composed of a point 32 with color, an English character 33, a star shape 34, and a combination of a dot having a color and a numeral and clover shape 35 .

FIG. 9 is a state diagram showing adjustment of the position of eye-sight fixation target during the visual field inspection performed by the method of FIG. Referring to FIG. 9, in the inspection type determination step S321, the other inspection can adjust the position of the target 21 for field measurement.

The eyesight fixing target 21 can be finely adjusted in position in accordance with the human characteristics of the subject, particularly the eye position. For example, one embodiment illustrates a state in which the visual field measurement area A is adjusted from the pre-adjustment state to the post-adjustment state so that the examinee can comfortably view the image. That is, the positions of the visual field measurement area A and the eyesight fixation target 21 are shifted to the right lower end.

10A and 10B are state diagrams showing a method of presenting a target for field of view measurement in the field of view inspection performed by the method of FIG. Referring to FIGS. 10A and 10B, it is possible to adjust the presentation interval of the visual field measurement according to the person's personal preference and perception characteristics. In the inspection type determination step (S321), the other inspection methods can present various methods of presenting a target for sight measurement.

Referring to FIG. 10A, the force-paced method presents a target for visual field measurement at a constant time interval (for example, 2 seconds) regardless of whether the examinee performs a previous target reaction (check mark) or not.

Referring to FIG. 10B, a self-paced method is presented after a certain period of time (for example, 2 seconds) from the time the examinee reacts to the previous target (checkmark).

In the self-paced method, if the examinee fails to react because he can not confirm the previous target, the target is presented at a predetermined time interval (for example, 4 seconds) based on the previous target presentation time.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And it goes without saying that the invention belongs to the scope of the invention.

11, 21: Target 12, 22: Additional target
31: point 32: point having color
33: English character 34: Star shape
35: combination 100: input
200: Inspection section 300:
400: Data storage unit A: Field of view measurement area
B: damaged area C: normal area
D: average brightness

Claims (17)

A testee information input step of inputting information for performing a visual field test of a testee;
Determining whether the first test or the subsequent test is to be performed based on information of the testee inputted in the testee information input step;
An initial inspection step of performing the initial inspection according to the determination of the initial inspection status determination step;
A personalized inspection step of performing the subsequent inspection according to the determination of the initial inspection status determination step; And
A visual inspection result storage step for storing a visual inspection result of the first inspection and the subsequent inspection
The method comprising the steps of: The method according to claim 1,
The testee information input step may include:
A personalized visual field test method that inputs demographic information such as the name, age, gender and test subject of the testee, and basic information about the test. The method according to claim 1,
The method of claim 1,
Comparing the information of the subject inputted in the subject information input step with the subject information of the visual field test result storing step to determine whether the first test or the subsequent test is performed. The method according to claim 1,
Wherein the initial inspection step comprises:
A damaged area inspection step of inspecting a damage area which the examinee can not confirm in the visual field measurement area,
A step of judging whether or not the damaged area is to be evaluated for damage,
A damage degree checking step of checking the damage degree of the damaged area,
Determining whether a normal area is to be evaluated for the degree of intrusion in the visual field measurement area,
A normal region inspection step of inspecting the normal region
The method comprising the steps of: 5. The method of claim 4,
The personalized inspection step
A test type determination step of determining whether the inspection type of the subject is a damage area inspection, a damage degree inspection, a normal area inspection, or another inspection in the subsequent inspection,
Reading a previous visual field test result reading a previous visual field test result corresponding to the type of inspection, and
A visual field inspection step of performing a visual field inspection according to the inspection type
The method comprising the steps of: 5. The method of claim 4,
The damaged area inspection step may include:
A target of average brightness which can be identified by a normal person of the same age range as the testee is presented to the target position presented at regular intervals in the visual field measurement region,
And evaluating, as a damaged area, an area that can not be confirmed by the examinee among the visual field measurement areas. The method according to claim 6,
Wherein the brightness of the target applied to the damaged area inspection step is determined by:
A personalized visual field test method that applies a verifiable average brightness or an arbitrarily set brightness of a normal age group desired by a testee for each target position. 5. The method of claim 4,
The damage degree checking step may include:
A personalized visual field inspection method for finding the minimum brightness that can be confirmed by the examinee while changing the brightness of the target for the damaged area. 9. The method of claim 8,
In the damage degree checking step,
And adjusting the target position of the damaged area inspection step to be more denser than the target interval of the damaged area inspection step, while being suitable for the damaged area. 5. The method of claim 4,
Wherein the normal region inspection step comprises:
A personalized visual field inspection method for finding the minimum brightness that can be confirmed by the examinee while varying the brightness of the target only for the position of the target identified by the examinee in the damage degree checking step. 11. The method of claim 10,
In the normal region inspection step, the index presentation position of the normal region,
And adjusting the target position of the normal region inspection step to fit the normal region and setting it to be less than the target gap of the normal region inspection step. 6. The method of claim 5,
Wherein the visual field inspection result storage step comprises:
Further comprising a visualization test result database building step of constructing a visual inspection database according to a test order for each test subject. 6. The method of claim 5,
The other test of the test type determination step
A personalized visual field test method that selects the type of eye fixation target, the target position for eye fixation, and the method of presenting the target for visual field measurement according to the preference of the testee during the visual field examination. 14. The method of claim 13,
The sight line fixation target type includes:
A personalized visual field test method that is at least one of various sizes, shapes, colors and flicker according to the testee's preference so that the testee can concentrate. 14. The method of claim 13,
The eye-gaze fixation target position is a position
A personalized visual field test method that is fine-tuned to a position where the examinee can see comfortably. 14. The method of claim 13,
The method of presenting a target for field of view measurement
A method of presenting at set time intervals, and
A method of presenting at a set time interval from the time the respondent responds
The method comprising the steps of: An input unit for inputting information of a testee;
An examiner for determining whether the first inspection is performed according to the input information and performing an initial inspection or a personalized inspection;
A target display unit for presenting targets at the time of inspection; And
And a data storage unit for storing a result of the inspection.

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