TWI820842B - Method for detecting dynamic intraocular pressure and the system - Google Patents

Abstract

The present invention provides a method for dynamic intraocular pressure detection and the system, in which a capturing unit is designed to collect relevant data for eyeball, and then such data is calculated through a processing unit to obtain a deformation level of the eyeball. By measuring in different statuses, dynamic intraocular pressure value is estimated with different deformation level of the eyeball, so that a complete non-contact intraocular pressure measure can be fulfilled. Except for greatly reducing the discomforts of detection, it can also reduce the difficulty of measurement, which can be easily completed even for children with the increasing accuracy of measurement.

Description

Dynamic intraocular pressure detection method and system

An intraocular pressure detection method and its system, particularly a dynamic intraocular pressure detection method and its system.

The most common way to measure intraocular pressure is the non-contact tonometer (NCT) measurement method, which uses gas pulse force to flatten the central area of the cornea with a diameter of 3.06mm, so it does not require anesthesia. You only need to place your head on the stand and look at the light spot in the instrument. At this time, the examiner aims at the patient's eyes through the eyepiece of the non-contact applanation intraocular pressure meter, presses the launch button, and emits a pulse of airflow. It can flatten the cornea. During this process, the surface of the cornea deforms from convex to flat to concave due to force. As the force weakens, it gradually changes from concave to flat, and finally returns to its original shape. By emitting infrared rays to detect the energy of light reflected from the cornea, we can infer the degree of cornea sunkenness. Different curvatures will cause different reflection angles of infrared rays. The time point when the instrument receives the strongest infrared ray signal is designated as the applanation point, and The insufflation pressure at the first flattening point is determined as the intraocular pressure. In this way, the intraocular pressure value can be displayed. Usually, after 2-3 consecutive times, the average value is taken.

Although the aforementioned non-contact applanation intraocular pressure meter is called non-contact, it still needs to emit pulsed airflow to flatten the cornea. This action often causes patients to blink unconsciously. What's more, some patients have inflammation and dry eyes. Ophthalmia or other symptoms lead to frequent blinking, which makes it more difficult to measure intraocular pressure with this measurement method. Moreover, the detection of intraocular pressure generally requires a period of time without moving the eyeballs. Therefore, The intraocular pressure detection device is provided with a pattern for the user to view and fix the position of the eyeball. However, the measurement time is quite long. If the detection object is a young child, the difficulty of the detection will increase. To this end, the present invention provides a dynamic Intraocular pressure detection method and its system, which uses a capture unit to measure, only captures the deformation amount of the eyeball in two different states, and converts the intraocular pressure based on the deformation amount in the two different situations, without requiring The detection is carried out in a special static state, as long as the deformation amount of the eyeball in different states can be captured, and there is no need to contact the eyeball, which greatly improves the discomfort of the conventional eye contact with pulse airflow and reduces the difficulty of detection. Increase its accuracy.

The main purpose of the present invention is to provide a dynamic intraocular pressure detection method, which uses an acquisition unit to respectively acquire the state information of the corresponding eyeball in different states, and calculates the amount of eyeball deformation, and obtains dynamic eye pressure based on different deformation amounts. The pressure value does not need to be pulsated airflow to form a depression in the eyeball, nor does it need to be particularly still, which greatly reduces the difficulty of detection.

Another object of the present invention is to provide a dynamic intraocular pressure detection system that uses a processing unit to receive and acquire the eyeball's status information, and obtains dynamic intraocular pressure values through different status information to improve accuracy.

In order to achieve the above object, one embodiment of the present invention discloses a dynamic intraocular pressure detection method, including the steps of: using an acquisition unit to acquire and transmit first status information of an eyeball to a computing unit; using the acquisition unit The acquisition unit acquires and transmits a second state information of the eyeball to the computing and processing unit; and the computing and processing unit performs operations based on the first state information and the second state information to generate a corresponding dynamic intraocular pressure value.

Preferably, the step of using a capturing unit to capture and transmit the first state information of an eyeball to a computing processing unit further includes the step of using the capturing unit to capture a first state information at a first time Emit a first light source to the eyeball, and receive a first reflection time of the first light source reflected by the eyeball, and the capture unit emits a second light source to the eyeball at a second time in the first state. , and receives a second reflection time of the second light source reflected by the eyeball, the first state information includes the first reflection time and the second reflection time; the computing unit performs the processing according to the first reflection time and the second reflection time respectively. The second reflection time obtains a first depth and a second depth corresponding to the eyeball; the computing unit performs calculations based on the first depth and the second depth respectively to generate a first surface area and a second surface area. ; and the computing unit obtains the first deformation amount of the eyeball corresponding to the first state based on the ratio of the first surface area to the second surface area.

Preferably, in the step of the computing unit obtaining a first depth and a second depth corresponding to the eyeball based on the first reflection time and the second reflection time, the first depth is the first depth. The product of the reflection time and the speed of light, and the second depth is the product of the second reflection time and the speed of light.

Preferably, in the step of the computing processing unit performing operations based on the first depth and the second depth respectively to generate a first surface area and a second surface area, the step further includes the step: the computing processing unit performs operations based on the first depth Generate a corresponding first coordinate value, and generate a corresponding second coordinate value for the second depth; and the computing unit performs calculations based on the first coordinate value and a first algorithm to obtain the first surface area, and Calculation is performed based on the second coordinate value and the first algorithm to obtain the second surface area; wherein the first algorithm is surface integral.

Preferably, the step of using the capturing unit to capture and transmit a second state information of the eyeball to the computing processing unit further includes the step of: using the capturing unit to capture a second state information at a third time Emit a third light source to the eyeball, and receive a third reflection time of the third light source reflected by the eyeball, and the capture unit emits a fourth light source to the eyeball at a fourth time in the second state. , and receives a fourth reflection time of the fourth light source reflected by the eyeball, the second state information includes the third reflection time and the fourth reflection time; the computing unit respectively performs the processing according to the third reflection time and the fourth reflection time. The fourth reflection time obtains a third depth and a fourth depth corresponding to the eyeball; the computing unit performs calculations based on the third depth and the fourth depth respectively to generate a third surface area and a fourth surface area. ; and the processing unit obtains the second deformation amount of the eyeball corresponding to the second state based on the ratio of the third surface area to the fourth surface area.

Preferably, in the step of the processing unit obtaining a third depth and a fourth depth corresponding to the eyeball based on the third reflection time and the fourth reflection time respectively, the third depth is the third depth. The product of the reflection time and the speed of light, and the fourth depth is the product of the fourth reflection time and the speed of light.

Preferably, in the step of the arithmetic processing unit performing operations based on the third depth and the fourth depth respectively to generate a third surface area and a fourth surface area, the step further includes the step: the arithmetic processing unit performs operations based on the third depth Generate a corresponding third coordinate value, and generate a corresponding fourth coordinate value for the fourth depth; and the computing unit performs calculations based on the third coordinate value and a second algorithm to obtain the third surface area, and The fourth coordinate value is calculated with the second algorithm to obtain the fourth surface area; wherein the second algorithm is surface integral.

Preferably, the capturing unit includes an infrared image sensor.

In order to achieve another of the above objects, one embodiment of the present invention discloses a dynamic intraocular pressure detection system, including: an acquisition unit that acquires first state information corresponding to an eyeball in a first state of the eyeball, and capturing a second state information corresponding to the eyeball in a second state of the eyeball; and a computing processing unit, signal-connected to the capturing unit, for receiving and based on the first state information and the second state information. Perform calculations to obtain a dynamic intraocular pressure value.

Preferably, the capturing unit includes an infrared image sensor.

The beneficial effect of the present invention is that the acquisition unit detects the state information of the eyeball in two different states, and calculates the deformation amount of the eyeball through the computing unit, and then converts the two different deformation amounts into dynamic intraocular pressure values. It implements a non-contact eyeball detection method to improve measurement accuracy, and does not require any attention to a specific position, reducing detection difficulty.

The relevant patented features and technical content of the present invention will be clearly presented in the following detailed description of the preferred embodiments with reference to the drawings.

Please refer to Figure 1, which is a schematic diagram of system operation according to an embodiment of the present invention. As shown in the figure, a dynamic intraocular pressure detection system of the present invention includes: an acquisition unit 1 and a processing unit 2, wherein the acquisition unit 1 is connected with the operation processing unit 2 through signals.

Please also refer to Figure 2, which is a method flow chart according to an embodiment of the present invention. As shown in the figure, a dynamic intraocular pressure detection method of the present invention includes the following steps:

Step S1: Use an acquisition unit to acquire and transmit the first status information of an eyeball to a computing processing unit;

Step S3: Use the acquisition unit to acquire and transmit a second state information of the eyeball to the computing processing unit; and

Step S5: The calculation processing unit performs calculations based on the first status information and the second status information to generate a corresponding dynamic intraocular pressure value.

As shown in step S1, the capture unit 1 emits the first light source to the eyeball at the first time in the first state of the eyeball, and receives the first reflection time of the first light source reflected by the eyeball, and then the first light source is received at the first reflection time of the eyeball. A second light source is emitted to the eyeball at a second time in a state, and a second reflection time of the second light source reflected by the eyeball is received. For this reason, the first state information includes the first reflection time and the second reflection time, in a In implementation, the first state is not limited to a stationary situation. The first time and the second time are both emitting light sources in the first state, and the first time and the second time are different, so as to deduce the The amount of eyeball deformation, but is not limited to this, the processing unit 2 can respectively obtain the first depth using the product of the first reflection time and the speed of light, and obtain the second depth using the product of the second reflection time and the speed of light, where the speed of light refers to The velocity in vacuum is a physical constant with an exact value of 299,792,458m/s. This embodiment uses 3×10 ⁸ m/s as the calculation, but is not limited to this.

At the same time, a corresponding first coordinate value is generated based on the first depth, and a corresponding second coordinate value is generated based on the second depth, and after calculation with the first algorithm, the first surface area and the second surface area are obtained respectively, and in an implementation For example, the first algorithm can use the surface integral to obtain the first deformation amount based on the ratio of the first surface area to the second surface area, where the capture unit 1 is an infrared image sensor, and the first light source and the second light source All are infrared light with wavelengths between 760nm and 1mm.

As shown in step S3, which is similar to the previous step, the capturing unit 1 emits the third light source to the eyeball at the third time in the second state, and receives the third reflection time of the third light source reflected by the eyeball. The connection is to emit the fourth light source to the eyeball at the fourth time in the second state of the eyeball and receive the fourth reflection time of the fourth light source reflected by the eyeball. Therefore, the second state information includes the third reflection time and the fourth reflection. time, the same as the previous step is that the third time and the fourth time both emit light sources in the second state, and the third time and the fourth time are different, and their purpose is also the same as the previous step. The purpose is the same, but the difference from the previous step is that the second state is different from the first state, and is used to obtain the difference in state information of the eyeballs in the two states. However, this is not limited to this. The processing unit 2 can use the third reflection time and the first state respectively. The product of the speed of light obtains the third depth, and the product of the fourth reflection time and the speed of light obtains the fourth depth. The speed of light refers to the speed of light in a vacuum. It is a physical constant with an exact value of 299,792,458m/s. This article In the embodiment, 3×10 ⁸ m/s is used as the operation, but it is not limited to this.

At the same time, a corresponding third coordinate value is generated based on the third depth, and a corresponding fourth coordinate value is generated based on the fourth depth, and after calculation with the second algorithm, the third surface area and the fourth surface area are obtained respectively, and in an implementation For example, the second algorithm can use the surface integral to obtain the second deformation amount based on the ratio of the third surface area and the fourth surface area, where the capture unit 1 is an infrared image sensor, and the third light source and the fourth light source All are infrared light with wavelengths between 760nm and 1mm.

As shown in step S5, the processing unit 2 calculates the corresponding first deformation amount, that is, the static appearance of the eyeball, based on the first state information obtained above, and the corresponding second deformation amount, that is, the rotational deformation, based on the second state information. Therefore, after obtaining different first deformation amounts and second deformation amounts for calculation, the dynamic stress data is estimated, and then the corresponding dynamic intraocular pressure value is generated. This dynamic intraocular pressure value can more accurately represent the eyeball. internal pressure.

To sum up, the dynamic intraocular pressure detection method and system of the present invention use an acquisition unit to acquire eyeball appearance information, and use a computing unit to perform calculations to compare the static appearance of the eyeball with the rotationally deformed appearance. And through the difference in appearance, different deformations are obtained and the dynamic stress data is estimated, thereby estimating the dynamic intraocular pressure value. Achieving completely non-contact dynamic intraocular pressure measurement not only greatly reduces the discomfort of detection, but also reduces the difficulty of measurement. Even if the measurement object is a child, it can be easily completed. It also increases the accuracy of measurement, so it can indeed achieve this goal. purpose of invention.

However, the above are only preferred embodiments of the present invention, and should not be used to limit the scope of the present invention. That is, any simple equivalent changes and modifications made in accordance with the patent scope of the present invention and the description of the invention, All are still within the scope of the patent of this invention.

1: Capture unit 2:Arithmetic processing unit S1: Steps S3: Steps S5: Steps

Figure 1: This is a schematic diagram of the system operation according to an embodiment of the present invention; and Figure 2: This is a method flow chart according to an embodiment of the present invention.

1: Capture unit

2:Arithmetic processing unit

Claims (10)

A dynamic intraocular pressure detection method, including steps: Using an acquisition unit to acquire and transmit first state information of an eyeball to a computing processing unit; Use the capturing unit to capture and transmit a second state information of the eyeball to the computing processing unit; and The calculation processing unit performs calculations based on the first status information and the second status information to generate a corresponding dynamic intraocular pressure value. According to the dynamic intraocular pressure detection method described in claim 1, the step of using an acquisition unit to acquire and transmit the first status information of an eyeball to a computing processing unit further includes the steps: The capturing unit emits a first light source to the eyeball at a first time in a first state, and receives a first reflection time of the first light source reflected by the eyeball, and the capturing unit emits a first light source to the eyeball at the first time. A state emits a second light source to the eyeball at a second time and receives a second reflection time of the second light source reflected by the eyeball. The first state information includes the first reflection time and the second reflection time; The computing processing unit obtains a first depth and a second depth corresponding to the eyeball based on the first reflection time and the second reflection time respectively; The computing processing unit performs operations based on the first depth and the second depth respectively to generate a first surface area and a second surface area; and The computing unit obtains the first deformation amount of the eyeball corresponding to the first state based on the ratio of the first surface area to the second surface area. According to the dynamic intraocular pressure detection method described in claim 2, the computing unit obtains a first depth and a depth of the eyeball corresponding to the first state based on the first reflection time and the second reflection time respectively. In the second depth step, the first depth is the product of the first reflection time and the speed of light, and the second depth is the product of the second reflection time and the speed of light. According to the dynamic intraocular pressure detection method described in claim 2, in the step of the calculation processing unit performing calculations based on the first depth and the second depth respectively to generate a first surface area and a second surface area, the step further includes the step : The computing processing unit generates a corresponding first coordinate value based on the first depth, and generates a corresponding second coordinate value based on the second depth; and The computing processing unit performs calculations based on the first coordinate value and a first algorithm to obtain the first surface area, and performs calculations based on the second coordinate value and the first algorithm to obtain the second surface area; Among them, the first algorithm is surface integral. According to the dynamic intraocular pressure detection method described in claim 1, the step of using the acquisition unit to acquire and transmit the second state information of the eyeball to the computing processing unit further includes the steps: The capturing unit emits a third light source to the eyeball at a third time in a second state, and receives a third reflection time of the third light source reflected by the eyeball, and the capturing unit emits a third light source to the eyeball at a third time. One of the two states emits a fourth light source to the eyeball at a fourth time, and receives a fourth reflection time of the fourth light source reflected by the eyeball. The second state information includes the third reflection time and the fourth reflection time; The computing processing unit obtains a third depth and a fourth depth corresponding to the eyeball based on the third reflection time and the fourth reflection time respectively; The computing processing unit performs operations based on the third depth and the fourth depth respectively to generate a third surface area and a fourth surface area; and The computing unit obtains the second deformation amount of the eyeball corresponding to the second state based on the ratio of the third surface area to the fourth surface area. According to the dynamic intraocular pressure detection method described in claim 5, the processing unit obtains a third depth and a fourth depth corresponding to the eyeball based on the third reflection time and the fourth reflection time respectively. , the third depth is the product of the third reflection time and the speed of light, and the fourth depth is the product of the fourth reflection time and the speed of light. According to the dynamic intraocular pressure detection method described in claim 5, in the step of the calculation processing unit performing calculations based on the third depth and the fourth depth respectively to generate a third surface area and a fourth surface area, the step further includes the step : The computing processing unit generates a corresponding third coordinate value based on the third depth, and generates a corresponding fourth coordinate value based on the fourth depth; and The computing processing unit performs calculations based on the third coordinate value and a second algorithm to obtain the third surface area, and performs calculations on the fourth coordinate value and the second algorithm to obtain the fourth surface area; Wherein, the second algorithm is surface integral. According to the dynamic intraocular pressure detection method of claim 1, the capturing unit includes an infrared image sensor. A dynamic intraocular pressure detection system, including: A capture unit captures a first state information corresponding to an eyeball in a first state of the eyeball, and captures a second state information corresponding to the eyeball in a second state of the eyeball; and An arithmetic processing unit is connected to the acquisition unit via signals, and is used to receive and perform operations based on the first status information and the second status information to obtain a dynamic intraocular pressure value. The dynamic intraocular pressure detection system according to claim 9, wherein the capturing unit includes an infrared image sensor.

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