CN101773379B - Multifunctional visual contrast sensitivity instrument - Google Patents
Multifunctional visual contrast sensitivity instrument Download PDFInfo
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- CN101773379B CN101773379B CN201010123763.7A CN201010123763A CN101773379B CN 101773379 B CN101773379 B CN 101773379B CN 201010123763 A CN201010123763 A CN 201010123763A CN 101773379 B CN101773379 B CN 101773379B
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- 238000007726 management method Methods 0.000 claims description 8
- 238000007639 printing Methods 0.000 claims description 7
- 238000013523 data management Methods 0.000 claims description 6
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- 208000002177 Cataract Diseases 0.000 abstract description 2
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Abstract
The invention relates to a multifunctional visual contrast sensitivity instrument for clinically detecting the visual contrast sensitivity of human eyes and particularly suiting for estimating and detecting the visual quality before or after an ophthalmic refractive surgery and a cataract surgery. The invention provides the following technical scheme that the multifunctional visual contrast sensitivity instrument comprises a data processing and controlling system, a box body, an eyepiece and a monitor which is arranged in the box body and corresponds to the eyepiece, the box body is an obscure camera, the data processing and controlling system comprises a detected virtual target database, a detected virtual target database management unit, a man-computer operation interface and a display, the monitor and the data processing and controlling system form signal transmission by a monitor-driving unit, the monitor is used for displaying a detected visual target, and the display simultaneously displays an observation visual target with the same pattern as the detected visual target. By the technical scheme, the invention provides the multifunctional visual contrast sensitivity instrument which avoids the interference of an environmental light source, has short detection time and is convenient for medical stuff to observe and operate.
Description
Technical field
The present invention relates to a kind of human eye vision contrast sensitivity that detects clinically, be particularly useful for the Multifunctional visual contrast sensitivity instrument of Ophthalmic Refractive Surgery, the vision quality evaluation detection of cataract operation front and back.
Background technology
Contrast sensitivity (contrast sensitivity function, CSF) be the physical quantity of the minimum black and white contrast of needed body surface while weighing the object of the visual system different sizes of identification (spatial frequencys), it is that a kind of new shape is felt the quantitative check method of function.This inspection be Schade in 1956 first the sinusoidal bar grid of use by oscilloscope display, then Campbell and Green(1965) through a large amount of research, comparatively complete contrast sensitivity concept has been proposed, and first Arden in 1978 has designed the grating card of one group of printing with the grating of different frequency, different contrast, the sinusoidal wave striped cardboard that comprises 6 different space frequency (0.2 ~ 6.4c/d), checks CSF and enters the clinical practice stage.
There is subsequently people to make character contrast sensitivity card (as Regan letter card) with the letter of different contrast.Domestic Wenzhou Medical College (1983) has developed laser retinal modulation transfer function (MTF) analyzer, and Hangzhou College of Electronics Industry (1989) develops full viewing system contrast sensitivity tester, and is applied to clinical.
In order to evaluate more objectively contrast sensitivity function, people are applied to the method for visual evoked potential in its inspection, and the method is to form according to the threshold value extrapolation of the zero amplitude of Campbell proposition and psychological physic method.Recently, Norcia etc. (1989) measure baby's contrast sensitivity by the method for stable state scanning VEP, VEP waveform is analyzed its power spectrum through fast fourier transform, according to VEP amplitude curve under each spatial frequency, make while being extrapolated to zero amplitude, the corresponding point of spatial frequency (cut-off frequency), although or changing mutually extrapolation according to waveform position, to find out the psychophysical method of contrast threshold simple, fast, the feature such as portable, but need patient's hand-in-glove, the power and electric physiology method falls on deaf ears substantially, the impact of motivation and learning experience, can reflect visual function comparatively objective and accurately.
At present, the instrument that domestic hospitals is used now, mostly from the U.S. CSV-1000 of Vecter Vision company type, is current generally acknowledged goldstandard contrast sensitivity instrument, its lamp box type design, the impact of easy examined distance, ambient light; Sinusoidal grating is printed on the panel of lamp box, and quantity is few unchanged, is also easily write down the accuracy that impact detects; Testing result is wanted manual drawing report, know detect data must inspection information, be very loaded down with trivial details, workload is large, efficiency is low, the detection eyes time is about half an hour.
Also having a kind of is the instrument of U.S. Stereo Optical company, it plants with the lantern slide projection inserting and show sinusoidal grating sighting target to screen in cabinet, the operating grip that utilization is connected with cabinet carries out sighting target change to be controlled, its be vulnerable to lantern slide distortion, go mouldy, the impact of the factor such as dirt pollution causes the inaccurate of testing result.Be subject to again the restriction of number of slides, its response speed with low uncertainty is slow.English operation interface is made troubles to use simultaneously.
Summary of the invention
The deficiency existing for prior art, the invention provides and a kind ofly avoid that environment light source disturbs, detection time is short, sighting target is stable accurately, medical personnel observe and easy to operate Multifunctional visual contrast sensitivity instrument.
For realizing technique scheme, the invention provides following technical scheme: a kind of Multifunctional visual contrast sensitivity instrument, it is characterized in that: include date processing and control system, casing, eyepiece and be placed in casing and setting corresponding to eyepiece face visual organ, described casing is camera bellows, described date processing and control system include tested sighting target data base, tested sighting target database management unit, man machine operation interface and display, the described visual organ that faces forms signal and transmits by facing visual organ driver element and date processing and control system, the described visual organ that faces is for showing tested sighting target, described display shows the observation sighting target identical with tested sighting target pattern simultaneously, described tested sighting target data base is for storing one or more groups the tested sighting target designing in advance, described tested sighting target database management unit is sent to respectively and faces visual organ and display shows according to choose corresponding tested sighting target from tested sighting target data base from the command request of man machine operation interface input.
Compared with prior art, the present invention is arranged on box house owing to facing visual organ, and tested sighting target is presented at and faces on visual organ, and outside light source cannot see through casing and enter box house, makes test avoid disturbing, and has improved testing precision; By being set in advance, the tested sighting target of a large amount of different space frequency, different modulating degree is stored in tested sighting target data base simultaneously, tested sighting target variation, medical personnel input instruction by man machine operation interface and can choose easily any one tested sighting target in tested sighting target data base and show examinee is tested to facing on visual organ, medical personnel can see the observation sighting target identical with tested sighting target pattern simultaneously on display, judge in time examinee's testing result correctness, thereby shorten detection time, improved testing efficiency.And the tested sighting target quantity in tested sighting target data base is large, medical personnel can select output at random, and irregular, examinee is difficult to memoriter guess sighting target, have at utmost guaranteed the verity of test.
The present invention is further set to: face in the light path between visual organ and eyepiece and be provided with and will face the lens optical system that on visual organ, tested sighting target dwindles by a certain percentage.
Wherein, lens optical system can form by being placed in the concavees lens that face between visual organ and eyepiece, and described faces outside one times of focal length of visual organ in concavees lens.
Adopt after above-mentioned setting, the face visual organ lower with regard to available resolution shows larger sighting target, scioptics optical system then, and what examinee saw in eyepiece is exactly a process tested sighting target that dwindle, standard, has reduced facing the requirement of visual organ resolution.
The present invention is further set to: between lens optical system and eyepiece, be provided with dazzle lamp plate, this dazzle lamp plate is provided with and eyepiece and the concentric open-work of lens optical system light path, and the outer of open-work is surrounded with dazzle lamp body.
Adopt technique scheme, this instrument that is arranged so that of dazzle lamp plate can be tested dazzle contrast.
The present invention is further set to: described date processing and control system also include examinee's Data Management Unit, examinee's personal information storage unit and examinee's testing result storage element and printing equipment, described examinee's personal information storage unit is for storing tested patient's name, age, the information such as sex, the testing result of described examinee's testing result storage element for storing examinee's colour vision and intensity contrast sensitivity, described examinee's Data Management Unit is controlled the testing result of examinee's colour vision and intensity contrast sensitivity is stored in examinee's personal information storage unit corresponding with examinee, and according to the command request from man machine operation interface input, by printing equipment by the printout of examinee's testing result.
Adopt technique scheme, can easily testing result be printed and management.
Below in conjunction with drawings and the specific embodiments, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is the decomposing schematic representation of the embodiment of the present invention;
Fig. 2 is the principle block diagram of the embodiment of the present invention;
Fig. 3 is the lens optical system index path in the embodiment of the present invention.
The specific embodiment
As Fig. 1, Fig. 2, a kind of Multifunctional visual contrast sensitivity instrument shown in Fig. 3, include date processing and control system, casing 1, eyepiece 2 and be placed in casing 1 and setting corresponding to eyepiece 2 face visual organ 3, casing 1 is camera bellows, date processing and control system include tested sighting target data base, tested sighting target database management unit, man machine operation interface and display, facing visual organ 3 forms signal and transmits by facing visual organ driver element and date processing and control system, face visual organ 3 for showing tested sighting target, display shows the observation sighting target identical with tested sighting target pattern simultaneously, tested sighting target data base is for storing one or more groups different space frequency designing in advance, the tested sighting target of different modulating degree, as colour vision sighting target and/or grey-scale contrast sighting target, the ability that colour vision sighting target distinguishes between colors for detection of patient, grey-scale contrast sighting target is distinguished the ability of grey-scale contrast for detection of examinee (patient).If necessary, can also increase the sighting target storehouse of other types.Tested sighting target database management unit is sent to respectively and faces visual organ 3 and display shows according to choose corresponding tested sighting target from tested sighting target data base from the command request of man machine operation interface input.
In this specific embodiment, date processing and control system are selected commercial computer, can certainly select other devices with data processing function, and as one chip microcomputer system, keyboard forms machine operation interface.The data communication interface that faces visual organ driver element and computer connects and composes signal transmission, and the partial memory in computer forms tested sighting target data base, and tested sighting target database management unit realizes by internal processes.For making casing 1 form camera bellows, at casing 1 inwall, be packed with black clouded glass; Make outside light source cannot enter casing 1 inside, for the test of casing 1 inside, avoid disturbing providing guarantee, make stable testing accurate; Face visual organ 3 and be fixed on casing 1 bottom, eyepiece 2 is tubular, is arranged on casing 1 sidewall, and aims at the center of facing visual organ 3.For convenient, install, casing 1 includes shell 11 and base 12, the inwall of shell 11 arranges black wool glass, base 12 is provided with gripper shoe 13, gripper shoe 13 is connected by support column 14 with base 12, face visual organ 3, lens optical system 4, dazzle lamp plate 5 and eyepiece 2 and by support bar 15, be located in gripper shoe 13 respectively, eyepiece 2 one end are exposed at outside casing 1 sidewall.During detection, medical personnel are keyboard input instruction by human-machine operation circle, examinee is observed and is faced the tested sighting target showing on visual organ 3 by eyepiece 2, then tell medical personnel oneself to see the appearance of pattern, medical personnel can see the observation sighting target identical with tested sighting target pattern simultaneously on display, judge in time examinee's testing result correctness, then according to testing result, reselect tested sighting target and detect, until obtain final result.
In such scheme, the peak of tested sighting target is apart from must just making tested sighting target normally show within 0.046mm, indeformable, therefore requires to face visual organ 3 and also has same resolution.But the resolution of facing visual organ product on existing market all cannot reach, even the high-resolution products of import is also difficult to meet.For solving the existing inadequate problem of resolution of facing visual organ 3, for tester can be tested accurately in test process, in the above embodiment of the present invention, can also in the light path of facing between visual organ 3 and eyepiece 2, be provided with and will face the lens optical system 4 that on visual organ 3, tested sighting target dwindles by a certain percentage, like this, just can resolution lower face the larger sighting target of demonstration on visual organ 3, scioptics optical system, what examinee saw in eyepiece is exactly a process tested sighting target that dwindle, standard.This lens optical system 4 is preferably concavees lens, and faces outside the focal length of visual organ 3 in concavees lens.For example, if the peak of tested sighting target distance must be in 0.046mm, and the existing high-resolution visual organ 3(high-definition liquid crystal display that faces) its concrete resolution is 1280x800, apart from be 0.204mm, the point that faces visual organ 3 is large 4.5 times apart from the some distance that expection requires.So tested sighting target is amplified to 5 times, facing demonstration on visual organ 3, and adopting a lens optical system 4 that dwindles 5 times of concavees lens design, design parameter can obtain it according to optical principle computing, repeats no more here.
Certainly, lens optical system 4 in above-described embodiment is not unique, it can also be the optical system that adopts Galilean telescope mode, only that the object lens in Galilean telescope are relative with the eyepiece in Multifunctional visual contrast sensitivity instrument, the eyepiece in Galilean telescope is with to face visual organ 3 relative.
On the basis of above scheme, date processing and control system can also include examinee's Data Management Unit again, examinee's personal information storage unit and examinee's testing result storage element and printing equipment, described examinee's personal information storage unit is for storing tested patient's name, age, the information such as sex, the testing result of described examinee's testing result storage element for storing examinee's colour vision and intensity contrast sensitivity, described examinee's Data Management Unit is controlled the testing result of examinee's colour vision and intensity contrast sensitivity is stored in examinee's personal information storage unit corresponding with examinee, detect complete computer and automatically the curve negotiating printing equipment by testing result is printed to report, simultaneously by examinee for information about and testing result by the order of time, be stored in data base, facilitated clinical consulting, transmission, than reciprocity needs.Convenient directly perceived due to what operate, complete eyes and detect about 10 minutes.Thereby shorten the testing time, improved work efficiency.
As being provided with dazzle lamp plate 5 between lens optical system 4 and eyepiece 2, the present invention but also can carry out the test of visual contrast sensitivity under dazzle state to patient.This dazzle lamp plate 5 is provided with respectively and eyepiece 2 and the concentric open-work 51 of lens optical system 4 light paths, and the outer of open-work 51 is surrounded with dazzle lamp body 52, and dazzle lamp body 52 is LED lamp body.
Claims (5)
1. a Multifunctional visual contrast sensitivity instrument, include date processing and control system, casing, eyepiece and be placed in casing and setting corresponding to eyepiece face visual organ, described casing is camera bellows, described date processing and control system include tested sighting target data base, tested sighting target database management unit, man machine operation interface and display, the described visual organ that faces forms signal and transmits by facing visual organ driver element and date processing and control system, the described visual organ that faces is for showing tested sighting target, described display shows the observation sighting target identical with tested sighting target pattern simultaneously, described tested sighting target data base is for storing one or more groups the tested sighting target designing in advance, described tested sighting target database management unit is sent to respectively and faces visual organ and display shows according to choose corresponding tested sighting target from tested sighting target data base from the command request of man machine operation interface input, it is characterized in that: described facing in the light path between visual organ and eyepiece is provided with and will faces the lens optical system that on visual organ, tested sighting target dwindles, sighting target in tested sighting target data base is amplified to 5 times, lens optical system dwindles 5 times by the sighting target that doubly amplifies 5 times and is shown in and faces on visual organ, the point that faces visual organ has expanded 4.5 times apart from the some distance that expection requires.
2. Multifunctional visual contrast sensitivity instrument according to claim 1, is characterized in that: described lens optical system forms by being placed in the concavees lens that face between visual organ and eyepiece, and described faces outside one times of focal length of visual organ in concavees lens.
3. Multifunctional visual contrast sensitivity instrument according to claim 1 and 2, it is characterized in that: described date processing and control system also include examinee's Data Management Unit, examinee's personal information storage unit and examinee's testing result storage element and printing equipment, described examinee's personal information storage unit is for storing tested patient's name, age, sex information, the testing result of described examinee's testing result storage element for storing examinee's colour vision and intensity contrast sensitivity, described examinee's Data Management Unit is controlled the testing result of examinee's colour vision and intensity contrast sensitivity is stored in examinee's personal information storage unit corresponding with examinee, and according to the command request from man machine operation interface input, by printing equipment by the printout of examinee's testing result.
4. Multifunctional visual contrast sensitivity instrument according to claim 1 and 2, it is characterized in that: between described lens optical system and eyepiece, be provided with dazzle lamp plate, this dazzle lamp plate is provided with and eyepiece and the concentric open-work of lens optical system light path, and the outer of open-work is surrounded with dazzle lamp body.
5. Multifunctional visual contrast sensitivity instrument according to claim 3, it is characterized in that: between described lens optical system and eyepiece, be provided with dazzle lamp plate, this dazzle lamp plate is provided with and eyepiece and the concentric open-work of lens optical system light path, and the outer of open-work is surrounded with dazzle lamp body.
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| CN201010123763.7A CN101773379B (en) | 2010-03-15 | 2010-03-15 | Multifunctional visual contrast sensitivity instrument |
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| CN108335560B (en) * | 2018-04-18 | 2023-12-12 | 浏阳市科技模型厂有限公司 | Astronaut training test science and technology museum exhibit |
| CN109984721B (en) * | 2019-03-29 | 2022-03-11 | 河海大学常州校区 | Device for detecting sensitivity of human eyes to optical parameters in illumination |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200948128Y (en) * | 2006-06-20 | 2007-09-19 | 无锡市康明医疗器械有限公司 | Glare comparing sensitivity degree instrument |
| CN201609358U (en) * | 2010-03-15 | 2010-10-20 | 杜学静 | Multifunctional visual contrast sensitivity instrument |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4489484B2 (en) * | 2004-03-30 | 2010-06-23 | 株式会社トプコン | Contrast sensitivity inspection support system and contrast sensitivity inspection support program |
| JP2008246153A (en) * | 2007-03-30 | 2008-10-16 | Topcon Corp | Optometer, and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200948128Y (en) * | 2006-06-20 | 2007-09-19 | 无锡市康明医疗器械有限公司 | Glare comparing sensitivity degree instrument |
| CN201609358U (en) * | 2010-03-15 | 2010-10-20 | 杜学静 | Multifunctional visual contrast sensitivity instrument |
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| JP特开2005-278942A 2005.10.13 |
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