CN2770573Y - Wave front vision diagnostic instrument - Google Patents
Wave front vision diagnostic instrument Download PDFInfo
- Publication number
- CN2770573Y CN2770573Y CN 200420107135 CN200420107135U CN2770573Y CN 2770573 Y CN2770573 Y CN 2770573Y CN 200420107135 CN200420107135 CN 200420107135 CN 200420107135 U CN200420107135 U CN 200420107135U CN 2770573 Y CN2770573 Y CN 2770573Y
- Authority
- CN
- China
- Prior art keywords
- wavefront
- eye
- measuring device
- computer
- visual
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000004438 eyesight Effects 0.000 title claims abstract description 22
- 230000000007 visual effect Effects 0.000 claims abstract description 50
- 230000004075 alteration Effects 0.000 claims abstract description 37
- 230000035945 sensitivity Effects 0.000 claims abstract description 29
- 230000003287 optical effect Effects 0.000 claims abstract description 13
- 238000003745 diagnosis Methods 0.000 claims abstract description 12
- 201000009310 astigmatism Diseases 0.000 claims abstract description 8
- 230000002207 retinal effect Effects 0.000 claims abstract description 6
- 238000012937 correction Methods 0.000 claims abstract description 5
- 230000004304 visual acuity Effects 0.000 claims abstract description 5
- 210000001525 retina Anatomy 0.000 claims description 13
- 230000004382 visual function Effects 0.000 claims description 4
- 238000011156 evaluation Methods 0.000 claims 1
- 208000017442 Retinal disease Diseases 0.000 abstract description 5
- 230000008859 change Effects 0.000 abstract description 4
- 210000001747 pupil Anatomy 0.000 abstract description 4
- 230000004297 night vision Effects 0.000 abstract description 3
- 208000029257 vision disease Diseases 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000011514 reflex Effects 0.000 description 5
- 230000010287 polarization Effects 0.000 description 4
- 239000004606 Fillers/Extenders Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000004296 scotopic vision Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 206010020675 Hypermetropia Diseases 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000004305 hyperopia Effects 0.000 description 1
- 201000006318 hyperopia Diseases 0.000 description 1
- 208000001491 myopia Diseases 0.000 description 1
- 230000004379 myopia Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Images
Landscapes
- Eye Examination Apparatus (AREA)
Abstract
本实用新型涉及一种属于医学诊断器械领域。包括眼波前像差测量装置；图形阈值视觉系统对比敏感度函数测量装置；一相连的计算机；一与所述计算机相连的输出设备，用于输出视觉诊断结果。波前视觉诊断仪能给出眼睛光学系统包括离焦和像散在内的十级像差矫正处方、视觉系统的视锐度、Strehl(斯特利尔)比率、对比敏感度函数；给出暗视觉下大瞳孔、大视场的波前像差随泽尼克(Zernike)展开项的变化曲线，实现对夜视觉疾病的诊断；给出视网膜系统的对比敏感度函数，进而对视网膜疾病进行诊断。
The utility model relates to a device belonging to the field of medical diagnostic instruments. It includes an eye wave front aberration measuring device; a graph threshold visual system contrast sensitivity function measuring device; a connected computer; an output device connected with the computer for outputting visual diagnosis results. The wavefront vision diagnostic instrument can give ten-order aberration correction prescriptions of the eye optical system including defocus and astigmatism, visual acuity of the visual system, Strehl ratio, and contrast sensitivity function; The change curve of the wavefront aberration of large pupil and large field of view with the Zernike expansion item under vision realizes the diagnosis of night vision diseases; the contrast sensitivity function of the retinal system is given to diagnose retinal diseases.
Description
Technical field
The invention belongs to the medical diagnosis instrument field.
Background technology
Eyes are most important organs that the mankind obtain external information, and vision detects and visual diagnostic relates to the almost major issue of all healths of masses.Vision-based detection can trace back to for 13rd century, up to now, and the human research that never stops vision detection and visual diagnostic.Detect about vision, Chinese patent 93105047.2 discloses Computerized multifunction optometric instrument, and Chinese patent 99254324.X discloses a kind of novel eyesight detecting instrument, and Chinese patent 99233794.1 discloses a kind of vision checkout gear.These visions detect the corrective prescription that can only provide eye optical system out of focus (myopia and hypermetropia) and astigmatism (astigmatism), can not provide the corrective prescription of other aberration of eye optical system.These existing vision checkout gears are subjective measurements, and the master that measurement accuracy depends on object states, and measuring speed is slower.About the detection of visual contrast sensitivity, Chinese patent 89104565.1 discloses multifunctional colour contrast sensitivity detector, and Chinese patent 02806082.2 discloses comparison diagram device, contrast visual sense degree measuring device and contrast visual sense degree measuring method.In addition, these measuring methods can only provide the contrast sensitivity function of whole visual system, it comprises the influence of retina system and eye optical system, therefore, can not make diagnosis accurately to human eye retina's disease according to the contrast sensitivity function of whole visual system.
Summary of the invention
In order to overcome the deficiency of existing eyesight detecting instrument and visual contrast sensitivity checkout gear, this utility model provides a kind of wavefront visual diagnostic instrument.This wavefront visual diagnostic instrument has following measuring ability and advantage:
Function one, this wavefront visual diagnostic instrument can determine the wave front aberration of human eye in less than 0.1 second time, this wave front aberration has been described the optics of the eye system more all sidedly and has been comprised the characteristic of out of focus, astigmatism and other senior aberration, thereby writes out a prescription for eye optical system provides ten grades of aberration corrections that comprise out of focus, astigmatism.
Function two, this wavefront visual diagnostic instrument can detect the objective judgment criteria of human eye visual function: Strehl (this Paul Tellier) ratio.
Function three, this wavefront visual diagnostic instrument can detect the contrast sensitivity function of retina system, can make diagnosis accurately to retinal diseases according to the contrast sensitivity function of detected retina system.
Function four, this wavefront visual diagnostic instrument can determine big pupil under the scotopic vision, big visual field wave front aberration, and the change curve that launches with Ze Nike (Zernike) of the wave front aberration that provides under the scotopic vision big pupil, big visual field, can realize diagnosis according to this curve to the night vision disease.
Function five, this wavefront visual diagnostic instrument can determine does not have the Snazzi of retinal diseases eye degree (vision).This measuring method is the objective measurement that does not rely on the object main suit, and measuring speed is fast, and measuring process can be finished within 1 second, and provides measurement result.
The technical scheme that its technical problem that solves this utility model adopts is:
Wavefront visual diagnostic instrument is made of wave-front optical aberration measurement device, figure threshold value visual system contrast sensitivity function measuring device, computer and outut device.
It is light source that the wave-front optical aberration measurement device adopts laser diode LD, and the beam collimation that passing through a collimating system that is made of microcobjective, pin hole, collimating lens and the light beam focusing system that is made of reflecting mirror, polarization beam apparatus, extender lens send light source LD also focuses on the retina; Adopt the wavefront division of the light beam that lenslet array will come out by retinal reflex to become the plurality of sub wavefront, and the array light spot image will be formed before all wavelets, the lenslet center distance of lenslet array is less than 0.3mm, and lenslet so disposes, so that it can provide resolving power to ten grades of aberrations; Adopt CCD as image received device, the receiving array light spot image.
Image received device CCD links to each other with computer, with the array light spot image input computer that receives, compare with the standard picture of storing in advance in the computer, and, draw the wavefront aberration data and ten grades of aberration corrections prescriptions that comprise out of focus, astigmatism of tested eye by Flame Image Process and wave-front reconstruction.Computer utilizes the wavefront aberration data of described tested eye and subretinal space as modulation degree (AIM) curve, further calculates, and then obtains MTF, the Snazzi degree of optics of the eye system, the objective judgment criteria of eye visual function: Strehl (this Paul Tellier) ratio.
The wave-front optical aberration measurement device adopts LED to stare target as big visual field, LED and describedly can be regulated by the distance between the light beam of retinal reflex, and then regulate describedly by the angle between the light beam of retinal reflex and the eye axle, reach the purpose of measuring the big visual field of eyes wave front aberration.With the change curve that Ze Nike (Zernike) launches, can realize diagnosis according to the wave front aberration of big pupil, big visual field under the tested eye scotopic vision of measuring to the night vision disease.
Wavefront visual diagnostic instrument adopts figure threshold value visual system contrast sensitivity function measuring device to measure the whole visual system contrast sensitivity function of eye, and described figure threshold value visual system contrast sensitivity function measuring device comprises display screen for graphic presentation, graphics controller, plane mirror.Described plane mirror and described light beam angle at 45 by retinal reflex, display screen for graphic presentation is identical to the distance of tested eye with described pin hole to the distance of tested eye; Display screen for graphic presentation is controlled by graphics controller, produces the grating fringe of different space frequency, different fringe contrasts.According to the resolving power of tested eye, determine the whole visual system contrast sensitivity function of eye to the grating fringe of different space frequency, different fringe contrasts.
Figure threshold value visual system contrast sensitivity function measuring device is connected with computer, in the whole visual system contrast sensitivity function input of the tested eye that tests out computer, and utilize the MTF of described optics of the eye system, calculate the contrast sensitivity function of retina system, and then retinal diseases is made diagnosis accurately.
Computer is connected with outut device, output visual diagnostic result.
Specify embodiment of the present invention below in conjunction with accompanying drawing.
Description of drawings
Accompanying drawing 1 is a wavefront visual diagnostic instrument structure principle chart of the present invention.
Accompanying drawing 2 is schematic diagrams of wavefront aberration measuring device (1) and figure threshold value visual system contrast sensitivity function measuring device (3) among Fig. 1.
As shown in Figure 2, in the wavefront aberration measuring device, laser diode LD (5) sends the light of 0.78 μ m, focus of the light beam on the pin hole (7) by microcobjective (6), the collimated lens of light beam (8) are collimated into collimated light beam then, reflex to polarization beam apparatus (10) through reflecting mirror (9), after polarization beam apparatus (10) reflection, by extender lens (11,12) enter tested eye (13), drop on retina (14) and go up minimum luminous point of formation, this luminous point is reflected by retina (14), through polarization beam apparatus (10) and extender lens (11,12,15,16) after, incide on the lenslet array (17).The array light spot image that lenslet array (17) forms is received by CCD (18), and CCD (18) is connected with computer (2), and the array light spot image is sent in the computer (2).As Fig. 1 further described, computer (2) was handled and wave-front reconstruction the array light spot image then, drew the wavefront aberration data and ten grades of aberration corrections prescriptions that comprise out of focus, astigmatism of tested eye.Computer (2) further calculates the wavefront aberration data of described tested eye as modulation degree (AIM) curve (3) in conjunction with subretinal space, and then obtains the MTF, Snazzi degree of optics of the eye system, the objective judgment criteria of eye visual function: Strehl (this Paul Tellier) ratio.
For measuring the big visual field of eyes wave front aberration, the distance that big visual field is stared between the light beam of target LED (21) and incident eyes can be regulated, when measuring the big visual field of eyes wave front aberration, tested eye moves with staring target LED (21), change the angle of incidence of the measuring beam that enters eyes, reach the purpose of measuring the big visual field of eyes wave front aberration.
Figure threshold value visual system contrast sensitivity function measuring device (4) is made up of display screen for graphic presentation (20), graphics controller (21) and plane mirror (22).Plane mirror (22) and systematic optical axis angle at 45, display screen for graphic presentation (20) is identical to the distance of tested eye with pin hole (7) to the distance of tested eye, graphics controller (21) control display screen for graphic presentation (20) produces the grating fringe of different space frequency, different fringe contrasts, according to the resolving power of tested eye, determine the whole visual system contrast sensitivity function of eye to the grating fringe of different space frequency, different fringe contrasts.
Figure threshold value visual system contrast sensitivity function measuring device (4) is connected with computer (2), in the whole visual system contrast sensitivity function input of the tested eye that tests out computer, and utilize the MTF of described optics of the eye system, calculate the contrast sensitivity function of retina system, and then retinal diseases is made diagnosis accurately.
Computer is connected with outut device, output visual diagnostic result.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420107135 CN2770573Y (en) | 2004-10-24 | 2004-10-24 | Wave front vision diagnostic instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420107135 CN2770573Y (en) | 2004-10-24 | 2004-10-24 | Wave front vision diagnostic instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2770573Y true CN2770573Y (en) | 2006-04-12 |
Family
ID=36704360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420107135 Expired - Fee Related CN2770573Y (en) | 2004-10-24 | 2004-10-24 | Wave front vision diagnostic instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2770573Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103230254A (en) * | 2013-04-19 | 2013-08-07 | 饶丰 | Human eye chromatic aberration measuring device based on Hartmann sensor |
| CN103284687A (en) * | 2009-10-23 | 2013-09-11 | 佳能株式会社 | Ophthalmology imaging device and ophthalmology imaging method |
| CN110248590A (en) * | 2017-02-07 | 2019-09-17 | 卡尔蔡司光学国际有限公司 | Prescription determines |
-
2004
- 2004-10-24 CN CN 200420107135 patent/CN2770573Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103284687A (en) * | 2009-10-23 | 2013-09-11 | 佳能株式会社 | Ophthalmology imaging device and ophthalmology imaging method |
| CN103284687B (en) * | 2009-10-23 | 2015-03-25 | 佳能株式会社 | Ophthalmology imaging device and ophthalmology imaging method |
| CN103230254A (en) * | 2013-04-19 | 2013-08-07 | 饶丰 | Human eye chromatic aberration measuring device based on Hartmann sensor |
| CN110248590A (en) * | 2017-02-07 | 2019-09-17 | 卡尔蔡司光学国际有限公司 | Prescription determines |
| CN110623628A (en) * | 2017-02-07 | 2019-12-31 | 卡尔蔡司光学国际有限公司 | Prescription determination |
| US10765313B2 (en) | 2017-02-07 | 2020-09-08 | Carl Zeiss Vision International Gmbh | Prescription determination |
| US10863901B2 (en) | 2017-02-07 | 2020-12-15 | Carl Zeiss Vision International Gmbh | Prescription determination |
| CN110623628B (en) * | 2017-02-07 | 2022-01-04 | 卡尔蔡司光学国际有限公司 | Prescription determination |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4308669B2 (en) | Apparatus and method for detecting subjective responses by objectively characterizing vision with wavefront sensing | |
| US6234978B1 (en) | Optical characteristic measuring apparatus | |
| US6042233A (en) | Optical characteristic measuring apparatus | |
| JP4121890B2 (en) | Fundus observation apparatus and fundus observation method | |
| US5929970A (en) | Optical characteristic measuring apparatus | |
| CN105496351B (en) | A kind of binocular optometry equipment | |
| Hampson | Adaptive optics and vision | |
| CN1747682A (en) | Ophthalmic talbot-moire wavefront sensor | |
| CN1245406A (en) | Apparatus for improving vision and resolution of retinal images | |
| WO2002032299A1 (en) | Optical characteristics measuring device | |
| AU2012283742B2 (en) | System and method for characterising eye-related systems | |
| WO2022057402A1 (en) | High-speed functional fundus three-dimensional detection system based on near-infrared light | |
| CN113749608B (en) | A human eye wavefront aberration detection system | |
| CN101248981A (en) | Visual Optical Analysis System Based on Wavefront Aberration | |
| JP2001321340A (en) | Eye characteristics measurement device | |
| CN102429634B (en) | Human eye hartmann contrast sensitivity measuring instrument | |
| CN101732029A (en) | Wave-front aberration-based vision tester | |
| CN202051688U (en) | Astigmatism objective refractometer based on wave-front aberration | |
| CN103471816A (en) | Multi-optical-axis progressive spectacle lens measurement method | |
| JP4652558B2 (en) | Optical property measuring device | |
| CN115590460A (en) | Wavefront aberration detection system for eyes | |
| KR20010089541A (en) | An instrument and a method for measuring the aberration of human eyes | |
| CN100450431C (en) | Human eye aberration and corneal surface measurement system based on microprism array Shack-Hartmann wavefront sensor | |
| CN2770573Y (en) | Wave front vision diagnostic instrument | |
| CN212489859U (en) | Adaptive optics scanning laser fundus imaging system based on transmission optics |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |