CN1820699A - Dynamic astigmatism detector for crystalline lens and detecting method - Google Patents
Dynamic astigmatism detector for crystalline lens and detecting method Download PDFInfo
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- CN1820699A CN1820699A CN 200510127306 CN200510127306A CN1820699A CN 1820699 A CN1820699 A CN 1820699A CN 200510127306 CN200510127306 CN 200510127306 CN 200510127306 A CN200510127306 A CN 200510127306A CN 1820699 A CN1820699 A CN 1820699A
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Abstract
The present invention discloses dynamic detector and detecting method for astigmatism of crystalline lens. Dynamic pictures with changeable colors and patterns and astigmatism pattern for astigmatism measurement are shown on the screen and dynamic astigmatism of crystalline lens is induced through the observation of eyes to the screen. By means of observing the astigmatism pattern and matching with the detection with slit lens, the dynamic astigmatism of crystalline lens for different colors and different distances are detected. The detector of the present invention can detect the dynamic astigmatism of crystalline lens accurately, and the detection method is simple in operation. The present invention is especially suitable for detecting the corrected diopter of computer operator.
Description
Technical field
The present invention relates to eyes astigmatism detection technique field, be specifically related to a kind of checkout gear and detection method of crystalline lens dynamic astigmatism.
Background technology
Light enters ophthalmic can not form focus on retina, such refraction of eye state is called astigmatism.Astigmatism is divided into corneal astigmatism and lenticular astigmatism.Sum of the two is sum total astigmatism (cornea follows except rule property, the counter rule property of crystalline lens).Cornea is positioned at the eye table, is convenient to check.The inspection method of many corneal astigmatisms is arranged at present, and crystalline lens is positioned at ophthalmic, and astigmatism can not directly be found, and has only by indirect mode and checks.The crystalline lens astigmatism is divided into static crystalline lens astigmatism and dynamic crystalline lens astigmatism.Static crystalline lens astigmatism can be tried to achieve by sum total astigmatism-corneal astigmatism.Dynamically the scattered-light detection of crystalline lens is domestic still blank now.
Summary of the invention
The object of the present invention is to provide a kind of device and detection method that can accurately detect the crystalline lens dynamic astigmatism, this method is convenient to operation.
The checkout gear of crystalline lens dynamic astigmatism, comprise a screen, show on the screen and detect scattered-light picture, picture is made up of tableaux and dynamic menu respectively, tableaux is measured scattered-light scatter diagram by nearly side's test near and distance harmony in the exterior and is formed, and dynamic menu is measured scattered-light scatter diagram by several dynamic pictures of measuring the crystalline lens dynamic astigmatism and one and formed.
Described screen is a computer screen.Described dynamic picture is the dynamic picture of convertible color and pattern.
The detection method of crystalline lens dynamic astigmatism of the present invention is:
(1), tested eyes retina retinoscopy optometry, find sum total astigmatism, use corneal curvature instrument or corneal topography, find corneal astigmatism; Calculate near point, far point, intermediate point and range of accommodation, and 40cm apart from the time convex lens number of degrees that should wear;
(2), eye distance computer screen 40cm, observe nearly side's test near and distance table in tableaux left side, measure vision, watch the right side scatter diagram to measure astigmatism and axle position then;
(3), the conversion static images is to dynamic picture, the dynamic picture of at least 4 different colours of conversion and pattern successively, watch dynamic picture 30-60 second, draw adjusting, watch the scatter diagram on right side then, measure the astigmatism and the axle position of every pictures far point, near point, intermediate point respectively, and note as point; With far point, near point and intermediate point is X-axis, with measured astigmatism or axle position is Y-axis, sets up astigmatism and axle position rectangular coordinate system, connects each measured point value, promptly obtain the crystalline lens dynamic astigmatism scope of human eye, the intermediate value of coordinate diagram promptly is corrigent diopter.
Dynamically the crystalline lens astigmatism is because inhomogeneous each of the crystalline lens power of regulating that causes of ciliary muscle contraction does not wait, and causes the temporary change of curvature of crystalline lens refractive surface, and optic astigmatic state occurs.Mainly contain two kinds (1) and when regulating and gather, produce corneal astigmatism.(2) accommodative astigmatism exists according to regulating, and does not have dynamic adjustments just can not occur.Adjusting is an eye in order to see clearly apart from the nearer thing of eye, and increases dioptric strength, makes fuzzy picture become function clearly.
The present invention utilizes different colours, different sizes, and different shape has dynamic picture conversion, by the observation of eyes to computer screen, regulates in order to cause, and the crystalline lens dynamic astigmatism is occurred.Then by the observation scatter diagram, cooperate the detection of crack eyeglass, find different colours, the dynamic crystalline lens astigmatism of different distance, it is the scope of crystalline lens dynamic astigmatism, express with point coordinates figure at last, reached the purpose that detects dynamic astigmatism, the intermediate value of crystalline lens dynamic astigmatism can be as correcting diopter.Checkout equipment of the present invention is simple, is not subjected to condition restriction such as place light, and is easy to use.Operational approach is simple, and operator can use the trial lens inspection, just can be competent at a job.General computer operator's working time before computer screen every day is longer, occurs the computer terminal syndrome easily, and detection method of the present invention is more suitable in the rectification diopter that detects the computer operator.
Description of drawings
Fig. 1 is the nearly side's test near and distance of a present invention table;
Fig. 2 and Fig. 3 are that the present invention measures scattered-light scatter diagram;
Fig. 4 is dynamic picture of the present invention (convertible different colours and pattern);
Fig. 5 is that the present invention measures scattered-light scatter diagram.
The specific embodiment
1, tested eyes retina retinoscopy optometry is found the sum total astigmatism.Use corneal curvature instrument or corneal topography, find corneal astigmatism.Calculate near point, far point, intermediate point and range of accommodation, and 40cm apart from the time convex lens number of degrees that should wear;
2, eye distance computer screen 40cm, nearly side's visual acuity chart Fig. 1 in observation tableaux left side measures vision, watches right side scatter diagram Fig. 2 and Fig. 3 to measure astigmatism and axle position then;
3, the conversion static images was watched Fig. 4 dynamic picture 40 seconds to dynamic picture, drew adjusting, watched the scatter diagram Fig. 5 on right side then, measured the astigmatism and the axle position of far point this moment, near point, intermediate point respectively; Conversion another with the dynamic picture of last different colours and pattern, the astigmatism and the axle position of measuring far point this moment, near point, intermediate point more respectively; 2 dynamic pictures of conversion are again noted the astigmatism and the axle position that record at every turn as point successively; With far point, near point and intermediate point is X-axis, with measured astigmatism or axle position is Y-axis, sets up astigmatism and axle position rectangular coordinate system, connects the measured value of totally 12 points, promptly obtain the crystalline lens dynamic astigmatism scope of human eye, the intermediate value of coordinate diagram promptly is corrigent diopter.
Claims (4)
1, the checkout gear of crystalline lens dynamic astigmatism, comprise a screen, it is characterized in that: show on the screen and detect scattered-light picture, picture is made up of tableaux and dynamic menu respectively, tableaux is made up of nearly side's visual acuity chart and the scattered-light scatter diagram of mensuration, and dynamic menu is made up of several dynamic pictures of measuring the crystalline lens dynamic astigmatism and the scattered-light scatter diagram of mensuration.
2, the checkout gear of crystalline lens dynamic astigmatism according to claim 1 is characterized in that: described screen is a computer screen.
3, the checkout gear of crystalline lens dynamic astigmatism according to claim 1 is characterized in that: described dynamic picture is the dynamic picture of convertible color and pattern.
4, a kind of detection method of crystalline lens dynamic astigmatism is characterized in that:
(1), tested eyes retina retinoscopy optometry, find sum total astigmatism, use corneal curvature instrument or corneal topography, find corneal astigmatism; Calculate near point, far point, intermediate point and range of accommodation, and 40cm apart from the time convex lens number of degrees that should wear;
(2), eye distance computer screen 40cm, observe nearly side's visual acuity chart in tableaux left side, measure vision, watch the right side scatter diagram to measure astigmatism and axle position then;
(3), the conversion static images is to dynamic picture, the dynamic picture of at least 4 different colours of conversion and pattern successively, watch dynamic picture 30-60 second, draw adjusting, watch the scatter diagram on right side then, measure the astigmatism and the axle position of every pictures far point, near point, intermediate point respectively, and note as point; With far point, near point and intermediate point is X-axis, with measured astigmatism or axle position is Y-axis, sets up astigmatism and axle position rectangular coordinate system, connects each measured point value, promptly obtain the crystalline lens dynamic astigmatism scope of human eye, the intermediate value of coordinate diagram promptly is corrigent diopter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510127306 CN1820699A (en) | 2005-12-03 | 2005-12-03 | Dynamic astigmatism detector for crystalline lens and detecting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510127306 CN1820699A (en) | 2005-12-03 | 2005-12-03 | Dynamic astigmatism detector for crystalline lens and detecting method |
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| CN1820699A true CN1820699A (en) | 2006-08-23 |
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| CN 200510127306 Pending CN1820699A (en) | 2005-12-03 | 2005-12-03 | Dynamic astigmatism detector for crystalline lens and detecting method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104684458A (en) * | 2012-09-28 | 2015-06-03 | 卡尔蔡司医疗技术股份公司 | Device for reliably determining biometric measurement variables of the whole eye |
| CN105342550A (en) * | 2015-09-29 | 2016-02-24 | 张仕郎 | Electronic astigmatic chart and method for measuring astigmatism focal power |
| ES2577860A2 (en) * | 2013-03-12 | 2016-07-19 | Steven P. Lee | Computerized refraction and astigmatism determination |
| CN111281335A (en) * | 2020-03-19 | 2020-06-16 | 连云港市妇幼保健院(连云港市第三人民医院) | Method for detecting intraocular astigmatism and astigmatism axis |
-
2005
- 2005-12-03 CN CN 200510127306 patent/CN1820699A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104684458A (en) * | 2012-09-28 | 2015-06-03 | 卡尔蔡司医疗技术股份公司 | Device for reliably determining biometric measurement variables of the whole eye |
| CN104684458B (en) * | 2012-09-28 | 2017-03-08 | 卡尔蔡司医疗技术股份公司 | For reliably determining the device of the bio-identification measurand of whole eyes |
| ES2577860A2 (en) * | 2013-03-12 | 2016-07-19 | Steven P. Lee | Computerized refraction and astigmatism determination |
| US10398304B2 (en) | 2013-03-12 | 2019-09-03 | Visibly, Inc. | Computerized testing and determination of a visual field of a patient |
| US10517476B2 (en) | 2013-03-12 | 2019-12-31 | Visibly, Inc. | Computerized testing and determination of a visual field of a patient |
| US11666211B2 (en) | 2013-03-12 | 2023-06-06 | Visibly, Inc. | Computerized testing and determination of a visual field of a patient |
| CN105342550A (en) * | 2015-09-29 | 2016-02-24 | 张仕郎 | Electronic astigmatic chart and method for measuring astigmatism focal power |
| CN111281335A (en) * | 2020-03-19 | 2020-06-16 | 连云港市妇幼保健院(连云港市第三人民医院) | Method for detecting intraocular astigmatism and astigmatism axis |
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