CN105640486B - A kind of method and device for determining camera oculi anterior volume - Google Patents
A kind of method and device for determining camera oculi anterior volume Download PDFInfo
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- CN105640486B CN105640486B CN201510947342.9A CN201510947342A CN105640486B CN 105640486 B CN105640486 B CN 105640486B CN 201510947342 A CN201510947342 A CN 201510947342A CN 105640486 B CN105640486 B CN 105640486B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/102—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for optical coherence tomography [OCT]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/117—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for examining the anterior chamber or the anterior chamber angle, e.g. gonioscopes
Abstract
The invention discloses a kind of method and device for determining camera oculi anterior volume, this method includes：Obtain prosthomere OCT original scan image；The prosthomere OCT image, the prosthomere OCT image scan position etc. that default first quantity is chosen from the original scan image divides anterior chamber, and default first quantity is even number；The prosthomere OCT image is shown, depicts anterior chamber's image；Anterior chamber's image is split by the ordinate for presetting the second quantity, each ordinate and the length of anterior chamber's intersection in each several part of computation partition；By each ordinate and the length and separator bar quantity of anterior chamber's intersection, camera oculi anterior volume in anterior chamber's image is calculated.The method and device provided by the present invention for determining camera oculi anterior volume, can overcome the shortcomings of current anterior chamber's volumetric measurement, more accurately obtain anterior chamber's volume, while can also save cost, increase economic benefit.
Description
Technical field
The present invention relates to medical detection technology, more particularly to a kind of method and device for determining camera oculi anterior volume.
Background technology
Glaucoma is that the whole world causes one of main illness in eye of visual loss, if do not taken in time and effectively treating, the visual field
Or eyesight can total loss, so as to ultimately result in blindness.And the blindness caused by this glaucoma, current medical treatments
Also can not reverse, therefore glaucoma has been primary or secondary irreversible causes of blindness in western countries, before also being come in China
Three.It by the discovery and intervention of early stage, can be maintained the function of most of patient.Therefore, the early stage of glaucoma
It is it was found that particularly important.
Due to difference in crowds, in west, open-angle glaucoma accounts for the overwhelming majority, and is accounted for quite in China's angle-closure glaucoma
A part.For angle-closure glaucoma, the measurement of anterior chamber angle and anterior chamber's volume is a kind of important method of early screening.Mesh
It is preceding clinical based on the examination of anterior chamber angle, but the shortcomings of subjective, poor repeatability, be not easy uniformly to contrast be present.Anterior chamber holds
Long-pending measurement also due to the limitation of apparatus and method and do not promote.
OCT anterior chamber's volumetric measurement mainly has 2 kinds at present：Utilize visante individual OCT horizontal image measurement anterior chamber's volumes
And tomey OCT newest at present utilize multiple image measurements anterior chamber's volume.It is each because eyeball is an irregular spheroid
The diameter in orientation is simultaneously different, so individual horizontal image can accurately not measure the size of anterior chamber's volume.And Tomey OCT
Anterior chamber's volume is calculated using 8 images, although relatively more accurate, due to expensive, popularity rate is not high, and due to sweeping simultaneously
Retouch 8 orientation, it is easy to cause wherein 1,2 orientation to cause measuring error because eyelid blocks.
In consideration of it, it is capable of the fully cost-effective side for determining camera oculi anterior volume while a kind of raising diagnosis and treatment efficiency is provided
Method and device are necessary.
The content of the invention
It is an object of the invention to provide a kind of method and device for determining camera oculi anterior volume, to help early detection and diagnosis
The ophthalmology diseases such as glaucoma, it can fully save cost while diagnosis and treatment efficiency is improved.
In order to solve the above technical problems, the present invention provides a kind of method for determining camera oculi anterior volume, including：
Obtain prosthomere OCT original scan image；
The prosthomere OCT image of default first quantity, the prosthomere OCT image scanning are chosen from the original scan image
Anterior chamber is divided in position etc., and default first quantity is even number；
The prosthomere OCT image is shown, depicts anterior chamber's image；
Anterior chamber's image is split by the ordinate for presetting the second quantity, each ordinate in each several part of computation partition
With the length of anterior chamber's intersection；
By each ordinate and the length of anterior chamber's intersection and the quantity of the ordinate, the anterior chamber is calculated
Camera oculi anterior volume in image.
Alternatively, the prosthomere OCT image that default first quantity is chosen from the original scan image includes：
Remove and scan incomplete image, default first quantity is chosen from the complete original scan image of scanning
Prosthomere OCT image.
Alternatively, it is described by each ordinate and the length of anterior chamber's intersection and the quantity of the ordinate, calculate
Obtaining camera oculi anterior volume in anterior chamber's image includes：
By each ordinate and the length of anterior chamber's intersection and the quantity of the ordinate, according to：
The camera oculi anterior volume in anterior chamber's image is calculated；Parameter interpretation therein is as follows：It is mutually perpendicular to two
Plane the eyeball quartering is obtained into two sections, by two sections along the decile of X direction 200, by Along ent from iris
Brilliant body front surface trace line is to the height of the distance, referred to as trace line of corneal endothelium trace line, the trace that one of plane intercepts
The height of line is designated asSpacing between Along ent is designated as c；The height of the trace line of another plane interception normal thereto
It is designated asSpacing between Along ent is designated as d.
Present invention also offers a kind of device for determining camera oculi anterior volume, including：
Acquisition module, for obtaining prosthomere OCT original scan image；
Module is chosen, for choosing the prosthomere OCT image of default first quantity from the original scan image, before described
Section OCT image scan position etc. divides anterior chamber, and default first quantity is even number；
Display module, for being shown to the prosthomere OCT image, depict anterior chamber's image；
Computing module, anterior chamber's image is split for the ordinate by presetting the second quantity, computation partition
Each ordinate and the length of anterior chamber's intersection in each several part；
Determining module, for passing through each ordinate and the length of anterior chamber's intersection and the quantity of the ordinate, meter
Calculation obtains camera oculi anterior volume in anterior chamber's image.
Alternatively, the selection module is specifically used for：
Remove and scan incomplete image, default first quantity is chosen from the complete original scan image of scanning
Prosthomere OCT image.
Alternatively, the determining module is specifically used for：
By each ordinate and the length of anterior chamber's intersection and the quantity of the ordinate, according to
The camera oculi anterior volume in anterior chamber's image is calculated, parameter interpretation therein is as follows：It is mutually perpendicular to two
Plane the eyeball quartering is obtained into two sections, by two sections along the decile of X direction 200, by Along ent from iris
Brilliant body front surface trace line is to the height of the distance, referred to as trace line of corneal endothelium trace line, the trace that one of plane intercepts
The height of line is designated asSpacing between Along ent is designated as c；The height of the trace line of another plane interception normal thereto
It is designated asSpacing between Along ent is designated as d.
The method and device provided by the present invention for determining camera oculi anterior volume, by the original scan figure for obtaining prosthomere OCT
Picture；The prosthomere OCT image that default first quantity etc. divides anterior chamber is chosen from original scan image；Prosthomere OCT image is shown
Show, depict anterior chamber's image；Anterior chamber's image is split by the ordinate for presetting the second quantity, in each several part of computation partition
Each ordinate and the length of anterior chamber's intersection；By each ordinate and the length of anterior chamber's intersection and the quantity of ordinate, calculate
Obtain camera oculi anterior volume in anterior chamber's image.The method and device provided by the present invention for determining camera oculi anterior volume, can overcome mesh
The deficiency of anterior chamber's volumetric measurement, anterior chamber's volume is more accurately obtained, while cost can also be saved, increase economic benefit.
Brief description of the drawings
Fig. 1 is a kind of flow chart of embodiment of the method for determination camera oculi anterior volume provided by the present invention；
Fig. 2 is the flow chart of another embodiment of the method for determination camera oculi anterior volume provided by the present invention；
Fig. 3 is the schematic diagram for being split OCT image；
Fig. 4 is the structured flowchart of the device of determination camera oculi anterior volume provided in an embodiment of the present invention.
Embodiment
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.Obviously, described embodiment is only part of the embodiment of the present invention, rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.
A kind of flow chart such as Fig. 1 institutes of embodiment of the method provided by the present invention for determining camera oculi anterior volume
Show, this method includes：
Step S101：Obtain prosthomere OCT original scan image；
Step S102：The prosthomere OCT image of default first quantity, the prosthomere are chosen from the original scan image
OCT image scan position etc. divides anterior chamber, and default first quantity is even number；
It is pointed out that the method provided by the present invention for determining camera oculi anterior volume can take any even number
Prosthomere OCT image, need to be only the surface sweeping line of decile anterior chamber.As surface sweeping line be 1 when, can be any angle；Such as scanning
, must be vertical between this two scan lines when line is 2, so as to which anterior chamber is divided into the quartering；When such as scan line being 3, its it
Between be 60 degree, 6 etc. divide anterior chamber；By that analogy.
Step S103：The prosthomere OCT image is shown, depicts anterior chamber's image；
Step S104：Anterior chamber's image is split by the ordinate for presetting the second quantity, each portion of computation partition
Each ordinate and the length of anterior chamber's intersection in point；
Step S105：By each ordinate and the length of anterior chamber's intersection and the quantity of the ordinate, calculate
The camera oculi anterior volume into anterior chamber's image.
The method provided by the present invention for determining camera oculi anterior volume, by the original scan image for obtaining prosthomere OCT；From original
The prosthomere OCT image that default first quantity etc. divides anterior chamber is chosen in beginning scan image；Prosthomere OCT image is shown, described
Go out anterior chamber's image；Anterior chamber's image is split by the ordinate for presetting the second quantity, each ordinate in each several part of computation partition
With the length of anterior chamber's intersection；By each ordinate and the length of anterior chamber's intersection and the quantity of ordinate, before being calculated
Camera oculi anterior volume in room image.The method provided by the present invention for determining camera oculi anterior volume, can overcome current anterior chamber's volume to survey
The deficiency of amount, anterior chamber's volume is more accurately obtained, while cost can also be saved, increase economic benefit.
On the basis of a upper embodiment, as a kind of preferred embodiment, error map can be got rid of when wrong
As being calculated, specifically, the stream of another embodiment of the method provided by the present invention for determining camera oculi anterior volume
Journey figure is as shown in Fig. 2 this method includes：
Step S201：Obtain prosthomere OCT original scan image；
Step S202：Remove and scan incomplete image, chosen from the complete original scan image of scanning certain
The prosthomere OCT image of (even number) quantity, the prosthomere OCT image are the image of decile anterior chamber；
Step S203：The prosthomere OCT image is shown, depicts anterior chamber's image；
Step S204：Anterior chamber's image is split by the ordinate of predetermined number, in each several part of computation partition
Each ordinate and the length of anterior chamber's intersection；
Step S205：By each ordinate and the length of anterior chamber's intersection and the quantity of cut-off rule, described in calculating
Camera oculi anterior volume in anterior chamber's image.
Due to the uncertain number of scanning lines of the present invention, therefore the present embodiment scans incomplete scan line by deleting, and only
Retain correct scan image, then carry out subsequent operation, avoid due to skew caused by scanning error, so as to further carry
The high accuracy rate of diagnosis and treatment.
So that the quantity of decile anterior chamber is even number as an example, the method for determination camera oculi anterior volume provided by the present invention is entered below
Row is expanded on further.Prosthomere OCT image is gathered by OCT, the image collected is imported in software Rhinocero, retouched manually
Anterior chamber's image is drawn, 2 horizontal linears are respectively drawn up and down in anterior chamber, 2 ends alignment room angle, then with 201 vertical bundles of lines this 2
200 equal portions of horizontal straight line etc. point, shown in the schematic diagram for being split OCT image such as Fig. 3.Then 201 straight lines are calculated
With the length of anterior chamber's intersection and the length of 200 equal portions.Software Mathematica is recycled to determine anterior chamber as follows
Volume.
In the present embodiment, using the orthogonal plane by eyeball center, the eyeball quartering is obtained into two sections,
By two sections along the decile of X direction 200.By at Along ent from iris crystalline substance body front surface trace line to corneal endothelium trace
The height of the distance of line, referred to as trace line.The height of the trace line of one of plane interception is designated asBetween Along ent
Spacing is designated as c；The height of the trace line of another plane interception normal thereto is designated asSpacing note between Along ent
For d.
It is not high using single image measurement anterior chamber's volume method degree of accuracy at present, and tomey OCT are expensive, and can adopt
With multiple image measurements, measuring error occurs in the case where there are several orientation to have eyelid to block.To overcome prior art
Defect, the present invention are improved to anterior chamber's method for measuring volume, any number of image can be taken to carry out accurate measurement, simultaneously
Error image is removed when wrong to be calculated, and can be applied to any equipment that can gather prosthomere image.
The device of determination camera oculi anterior volume provided in an embodiment of the present invention is introduced below, determination eye described below
The method of the device of anterior chamber's volume and above-described determination camera oculi anterior volume can be mutually to should refer to.Fig. 4 is implemented for the present invention
The structured flowchart of the device for the determination camera oculi anterior volume that example provides, reference picture 4 determine that the device of camera oculi anterior volume can include：
Acquisition module 100, for obtaining prosthomere OCT original scan image；
Module 200 is chosen, for choosing the prosthomere OCT image of default first quantity, institute from the original scan image
State prosthomere OCT image scan position etc. and divide anterior chamber, default first quantity is even number；
Display module 300, for being shown to the prosthomere OCT image, depict anterior chamber's image；
Computing module 400, anterior chamber's image is split for the ordinate by presetting the second quantity, computation partition
Each several part in each ordinate and anterior chamber's intersection length；
Determining module 500, for by each ordinate and the length of anterior chamber's intersection and the quantity of the ordinate,
Calculate camera oculi anterior volume in anterior chamber's image.
Alternatively, above-mentioned selection module 200 is specifically used for：
Remove and scan incomplete image, default first quantity is chosen from the complete original scan image of scanning
Prosthomere OCT image.
Alternatively, above-mentioned determining module 500 is specifically used for：
In the woods by the length and the ordinate of each ordinate and anterior chamber's intersection, according to
Determine the camera oculi anterior volume in anterior chamber's image, parameter interpretation therein is as follows：It is orthogonal flat with two
The eyeball quartering is obtained two sections by face, by two sections along the decile of X direction 200.By at Along ent from iris crystal
Height of the preceding surface trace line to the distance, referred to as trace line of corneal endothelium trace line.The trace line of one of plane interception
Height is designated asSpacing between Along ent is designated as c；The height of the trace line of another plane interception normal thereto is designated asSpacing between Along ent is designated as d.
The device provided by the present invention for determining camera oculi anterior volume, by the original scan image for obtaining prosthomere OCT；From original
The prosthomere OCT image that certain (even number) quantity etc. divides anterior chamber is chosen in beginning scan image；Prosthomere OCT image is shown, retouched
Draw anterior chamber's image；Anterior chamber's image is split by the ordinate of predetermined number, in each several part of computation partition each ordinate with
The length of anterior chamber's intersection；By each ordinate and the length of anterior chamber's intersection and the quantity of cut-off rule, anterior chamber's figure is calculated
The camera oculi anterior volume as in.The device provided by the present invention for determining camera oculi anterior volume, can overcome current anterior chamber's volumetric measurement
Deficiency, anterior chamber's volume is more accurately obtained, while cost can also be saved, increase economic benefit.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be with it is other
The difference of embodiment, between each embodiment same or similar part mutually referring to.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (4)
- A kind of 1. method for determining camera oculi anterior volume, it is characterised in that including：Obtain prosthomere OCT original scan image；The prosthomere OCT image of default first quantity, the prosthomere OCT image scan position are chosen from the original scan image Decile anterior chamber, default first quantity is even number；The prosthomere OCT image is shown, depicts anterior chamber's image；Anterior chamber's image is split by the ordinate for presetting the second quantity, each ordinate is with before in each several part of computation partition The length of room intersection；By each ordinate and the length of anterior chamber's intersection and the quantity of the ordinate, anterior chamber's image is calculated Middle camera oculi anterior volume；It is described by each ordinate and the length of anterior chamber's intersection and the quantity of the ordinate, the anterior chamber is calculated Camera oculi anterior volume includes in image：By each ordinate and the length of anterior chamber's intersection and the quantity of the ordinate, according to：<mfenced open = "" close = ""> <mtable> <mtr> <mtd> <mrow> <munderover> <mo>&Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>0</mn> </mrow> <mn>90</mn> </munderover> <mrow> <mo>(</mo> <mi>i</mi> <mo>+</mo> <mn>0.5</mn> <mo>)</mo> </mrow> <msubsup> <mo>&Integral;</mo> <mn>0</mn> <mfrac> <mi>&pi;</mi> <mn>2</mn> </mfrac> </msubsup> <msqrt> <mrow> <msup> <mi>c</mi> <mn>2</mn> </msup> <msup> <mi>sin</mi> <mn>2</mn> </msup> <mi>&theta;</mi> <mo>+</mo> <msup> <mi>d</mi> <mn>2</mn> </msup> <msup> <mi>cos</mi> <mn>2</mn> </msup> <mi>&theta;</mi> </mrow> </msqrt> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mo>&times;</mo> <mo>&lsqb;</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <mfrac> <mrow> <mn>2</mn> <mi>&theta;</mi> </mrow> <mi>&pi;</mi> </mfrac> <mo>)</mo> </mrow> <mrow> <mo>(</mo> <msub> <mi>a</mi> <mrow> <mn>101</mn> <mo>-</mo> <mi>i</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>a</mi> <mrow> <mn>100</mn> <mo>-</mo> <mi>i</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>a</mi> <mrow> <mn>101</mn> <mo>+</mo> <mi>i</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>a</mi> <mrow> <mn>102</mn> <mo>+</mo> <mi>i</mi> </mrow> </msub> <mo>)</mo> </mrow> <mo>+</mo> <mfrac> <mrow> <mn>2</mn> <mi>&theta;</mi> </mrow> <mi>&pi;</mi> </mfrac> <mrow> <mo>(</mo> <msub> <mi>b</mi> <mrow> <mn>101</mn> <mo>-</mo> <mi>i</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>b</mi> <mrow> <mn>100</mn> <mo>-</mo> <mi>i</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>b</mi> <mrow> <mn>101</mn> <mo>+</mo> <mi>i</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>b</mi> <mrow> <mn>102</mn> <mo>+</mo> <mi>i</mi> </mrow> </msub> <mo>)</mo> </mrow> <mo>&rsqb;</mo> <mo>&times;</mo> <mo>&lsqb;</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <mfrac> <mrow> <mn>2</mn> <mi>&theta;</mi> </mrow> <mi>&pi;</mi> </mfrac> <mo>)</mo> </mrow> <mi>c</mi> <mo>+</mo> <mfrac> <mrow> <mn>2</mn> <mi>&theta;</mi> </mrow> <mi>&pi;</mi> </mfrac> <mi>d</mi> <mo>&rsqb;</mo> <mi>d</mi> <mi>&theta;</mi> </mrow> </mtd> </mtr> </mtable> </mfenced>The camera oculi anterior volume in anterior chamber's image is calculated；Parameter interpretation therein is as follows：It is orthogonal flat with two The eyeball quartering is obtained two sections by face, by two sections along the decile of X direction 200, by Along ent from iris crystal Preceding surface trace line to the distance, referred to as trace line of corneal endothelium trace line height, the trace line of one of plane interception Height is designated asSpacing between Along ent is designated as c；The height of the trace line of another plane interception normal thereto is designated asSpacing between Along ent is designated as d.
- 2. the method for camera oculi anterior volume is determined as claimed in claim 1, it is characterised in that described from the original scan image The middle prosthomere OCT image for choosing default first quantity includes：Remove and scan incomplete image, the prosthomere of default first quantity is chosen from the complete original scan image of scanning OCT image.
- A kind of 3. device for determining camera oculi anterior volume, it is characterised in that including：Acquisition module, for obtaining prosthomere OCT original scan image；Module is chosen, for choosing the prosthomere OCT image of default first quantity, the prosthomere from the original scan image OCT image scan position etc. divides anterior chamber, and default first quantity is even number；Display module, for being shown to the prosthomere OCT image, depict anterior chamber's image；Computing module, anterior chamber's image is split for the ordinate by presetting the second quantity, each portion of computation partition Each ordinate and the length of anterior chamber's intersection in point；Determining module, for by each ordinate and the length of anterior chamber's intersection and the quantity of the ordinate, calculating The camera oculi anterior volume into anterior chamber's image；The determining module is specifically used for：By each ordinate and the length of anterior chamber's intersection and the quantity of the ordinate, according to<mfenced open = "" close = ""> <mtable> <mtr> <mtd> <mrow> <munderover> <mo>&Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>0</mn> </mrow> <mn>99</mn> </munderover> <mrow> <mo>(</mo> <mi>i</mi> <mo>+</mo> <mn>0.5</mn> <mo>)</mo> </mrow> <msubsup> <mo>&Integral;</mo> <mn>0</mn> <mfrac> <mi>&pi;</mi> <mn>2</mn> </mfrac> </msubsup> <msqrt> <mrow> <msup> <mi>c</mi> <mn>2</mn> </msup> <msup> <mi>sin</mi> <mn>2</mn> </msup> <mi>&theta;</mi> <mo>+</mo> <msup> <mi>d</mi> <mn>2</mn> </msup> <msup> <mi>cos</mi> <mn>2</mn> </msup> <mi>&theta;</mi> </mrow> </msqrt> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mo>&times;</mo> <mo>&lsqb;</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <mfrac> <mrow> <mn>2</mn> <mi>&theta;</mi> </mrow> <mi>&pi;</mi> </mfrac> <mo>)</mo> </mrow> <mrow> <mo>(</mo> <msub> <mi>a</mi> <mrow> <mn>101</mn> <mo>-</mo> <mi>i</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>a</mi> <mrow> <mn>100</mn> <mo>-</mo> <mi>i</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>a</mi> <mrow> <mn>101</mn> <mo>+</mo> <mi>i</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>a</mi> <mrow> <mn>102</mn> <mo>+</mo> <mi>i</mi> </mrow> </msub> <mo>)</mo> </mrow> <mo>+</mo> <mfrac> <mrow> <mn>2</mn> <mi>&theta;</mi> </mrow> <mi>&pi;</mi> </mfrac> <mrow> <mo>(</mo> <msub> <mi>b</mi> <mrow> <mn>101</mn> <mo>-</mo> <mi>i</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>b</mi> <mrow> <mn>100</mn> <mo>-</mo> <mi>i</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>b</mi> <mrow> <mn>101</mn> <mo>+</mo> <mi>i</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>b</mi> <mrow> <mn>102</mn> <mo>+</mo> <mi>i</mi> </mrow> </msub> <mo>)</mo> </mrow> <mo>&rsqb;</mo> <mo>&times;</mo> <mo>&lsqb;</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <mfrac> <mrow> <mn>2</mn> <mi>&theta;</mi> </mrow> <mi>&pi;</mi> </mfrac> <mo>)</mo> </mrow> <mi>c</mi> <mo>+</mo> <mfrac> <mrow> <mn>2</mn> <mi>&theta;</mi> </mrow> <mi>&pi;</mi> </mfrac> <mi>d</mi> <mo>&rsqb;</mo> <mi>d</mi> <mi>&theta;</mi> </mrow> </mtd> </mtr> </mtable> </mfenced>The camera oculi anterior volume in anterior chamber's image is calculated, parameter interpretation therein is as follows：It is orthogonal flat with two The eyeball quartering is obtained two sections by face, by two sections along the decile of X direction 200, by Along ent from iris crystal Preceding surface trace line to the distance, referred to as trace line of corneal endothelium trace line height, the trace line of one of plane interception Height is designated asSpacing between Along ent is designated as c；The height of the trace line of another plane interception normal thereto is designated asSpacing between Along ent is designated as d.
- 4. the device of camera oculi anterior volume is determined as claimed in claim 3, it is characterised in that the selection module is specifically used for：Remove and scan incomplete image, the prosthomere of default first quantity is chosen from the complete original scan image of scanning OCT image.
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