CN1011941B - Double-slit simultaneous camera for reflection of cornea and eyeground - Google Patents
Double-slit simultaneous camera for reflection of cornea and eyegroundInfo
- Publication number
- CN1011941B CN1011941B CN 86102370 CN86102370A CN1011941B CN 1011941 B CN1011941 B CN 1011941B CN 86102370 CN86102370 CN 86102370 CN 86102370 A CN86102370 A CN 86102370A CN 1011941 B CN1011941 B CN 1011941B
- Authority
- CN
- China
- Prior art keywords
- slit
- photographic apparatus
- reflective
- photographic
- corneas
- 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
Links
- 210000004087 cornea Anatomy 0.000 title claims abstract description 17
- 208000029091 Refraction disease Diseases 0.000 claims abstract description 11
- 230000004430 ametropia Effects 0.000 claims abstract description 11
- 208000014733 refractive error Diseases 0.000 claims abstract description 11
- 206010002537 anisometropia Diseases 0.000 claims abstract description 7
- 208000030533 eye disease Diseases 0.000 claims abstract description 7
- 230000003287 optical effect Effects 0.000 claims description 11
- 230000011514 reflex Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000005755 formation reaction Methods 0.000 claims 1
- 208000004350 Strabismus Diseases 0.000 abstract description 7
- 238000011835 investigation Methods 0.000 abstract description 5
- 230000004438 eyesight Effects 0.000 abstract description 2
- 238000005286 illumination Methods 0.000 abstract 1
- 201000009310 astigmatism Diseases 0.000 description 4
- 210000001747 pupil Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 206010007747 Cataract congenital Diseases 0.000 description 1
- 206010018325 Congenital glaucomas Diseases 0.000 description 1
- 206010012565 Developmental glaucoma Diseases 0.000 description 1
- 208000001692 Esotropia Diseases 0.000 description 1
- 201000005538 Exotropia Diseases 0.000 description 1
- 206010015995 Eyelid ptosis Diseases 0.000 description 1
- 208000007157 Hydrophthalmos Diseases 0.000 description 1
- 206010020675 Hypermetropia Diseases 0.000 description 1
- 208000009795 Microphthalmos Diseases 0.000 description 1
- 206010037538 Pupils unequal Diseases 0.000 description 1
- 208000001239 anisocoria Diseases 0.000 description 1
- 201000001024 buphthalmos Diseases 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 201000006318 hyperopia Diseases 0.000 description 1
- 230000004305 hyperopia Effects 0.000 description 1
- 201000006316 hypertropia Diseases 0.000 description 1
- 201000006309 hypotropia Diseases 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 201000010478 microphthalmia Diseases 0.000 description 1
- 208000001491 myopia Diseases 0.000 description 1
- 230000004379 myopia Effects 0.000 description 1
- 201000003004 ptosis Diseases 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
Images
Landscapes
- Eye Examination Apparatus (AREA)
Abstract
The present invention relates to a double-slit simultaneous photographic instrument for the reflection of the cornea and the eyeground, which is composed of a special device for a double-slit photographic instrument, a middle focus lens and a photographic instrument body, wherein the special device is provided with a photographic slit, an illumination slit, a flash lamp tube and a flicker watch device. By simultaneously photographing the reflection of the two corneas and the eyeground of a person to be examined and analyzing photographed photos, general investigation can be conveniently, rapidly, economically, objectively and accurately carried out to eye diseases of children, such as strabismus, anisometropia, ametropia, etc. which seriously hinder eyesight development. The photographic instrument can be used by ophthalmology workers and children health care workers.
Description
The invention belongs to the generaI investigation instrument of oculopathy such as medical science ophthalmology stravismus, ametropia, anisometropia.
The ophthalmic applications cornea, Photographic technique generaI investigation of reflective while of optical fundus stravismus, anisometropia, the technology of oculopathy such as ametropia, by Dutch scholar Kaakinen in (Kaakinen K.A Simple method for screening of children with strabismus, the anisometropia or ametropia by simultaneous photography of the corneal and the fundus reflexs Acta Ophthalmol 1979 of inventing in 1979; 57:161-171).But up to now, the home and abroad does not have the special accurately photographic apparatus of design precision, compact conformation, complete function and result as yet.
The objective of the invention is for the serious oculopathy that hinders the small children vision to grow such as medical science ophthalmology generaI investigation stravismus, anisometropia, ametropia provide a kind of simple in structure, easy to use, check quick, economical, objective and result's instrument accurately and reliably.
This generaI investigation instrument is the photographic apparatus type, below in conjunction with the content and the most preferred embodiment of accompanying drawing narration invention.
Fig. 1 is the front view of two fissure type corneas, the reflective while photographic apparatus in optical fundus.
Fig. 2 is the side sectional view of two fissure type corneas, the reflective while photographic apparatus in optical fundus.
Diagram: 1. pair crack cornea, photographic apparatus isolated plant of reflective while of optical fundus; 2. middle zoom lens; 3. photographic apparatus fuselage; 4. photographing slit; 5. illuminating slit; 6. flicker watching aid; 7. flash lamp tube; 8. flash lamp tube chamber; 9. engage threads; 10. anglec of rotation control spring sheet; 11. anglec of rotation control is recessed.
As shown in the figure, this instrument is by two cracks cornea, photographic apparatus isolated plant of reflective while of eyeground (1) Middle zoom lens (2) and photographic apparatus fuselage (3) three partly form. There is photographing slit (4) two cracks cornea, center, photographic apparatus isolated plant of reflective while front, eyeground, and there is with it parallel illuminating slit (5) its top. There is flash lamp tube (7) at illuminating slit (5) rear, and it is arranged in flash lamp tube chamber (8), in order to avoid rearward reach the side light leak. Isolated plant (1) joins by engage threads (9) and middle zoom lens (2) and can rotate around camera lens optical axis, and its anglec of rotation is controlled by recessed (11) of control that are arranged in the control spring sheet (10) on the isolated plant (1) and be positioned on the zoom lens (2).
For most preferred embodiment, above-mentioned photographing slit (4) and illuminating slit (5) are respectively long for 35mm, the strip crack that 2mm is wide, and its spacing is 6mm(or 2～20mm).Flash lamp tube (7) is long to be 36mm, and guide number is 16(DIN 21FM), its three electrodes link to each other with external charger via three thin insulated electric conductors.When isolated plant (1) rotates to 0 °, 45 ° and 90 °, control spring sheet (10) engages, produce with control recessed (11) " clickly ".Middle zoom lens (2) focal length is between 135mm(or the 105～210mm), F-number is 2.8.Photographic apparatus fuselage (3) is 135 single-lens reflexes.2 flicker watching aids (6) are made of light emitting diode and oscillating circuit plate, per second flicker 2 times.
In order to deepen understanding, be necessary to narrate its using method to each technical characterictic of this photographic apparatus.
In half darkroom, this photographic apparatus front end is from 1 meter distance of examinee's head, aims at nasion portion focusing between two of the examinees, and aperture places maximum.Open flicker watching aid (6), attract the examinee to watch attentively to this photographic apparatus, press shutter this moment, promptly finishes inspection.After treating that film is gone out, under amplifying device, check tested eye:
1. the reflective center that whether is positioned at of two corneas.The center person is for facing; If reflective departing from of the cornea of a glance is stravismus, inwardly depart from and be the exotropia, outwards depart from and be esotropia; Downward bias is hypertropia from the person, and upwards not departing from the person is hypotropia, and the number of degrees that depart from are obtained by following formula:
D＝11d
D is the deflection number of degrees (unit is degree) in the following formula, and d is the distance (unit is millimeter) of deflecting angle center membrane.
2. whether reflective areas appears in the pupil.Reflective areas occurring then is ametropia, if reflective areas is positioned at the pupil top, represents that tested eye is a myopia, if reflective areas is positioned at the below, represents that tested eye is a hypermetropia.Its ametropia number of degrees can be obtained by following formula:
R＝ (h)/(P′) -1
R is the ametropia degree in the following formula; H is a distance between photographing slit (4) and the illuminating slit (5), is 6mm herein, and P ' is the height of pupil dark space (being the residue part of reflective areas in the pupil).
If the astigmatism degree that detects tested eye with axial, then needs isolated plant (1) is placed 0 °, respectively to take once for 45 ° and 90 °, the ametropia degree of establishing three gained is respectively R
a, R
bAnd R
c, then by following formula get final product astigmatism degree and axially:
C＝R
a+R
c-2S
S is the concave-sphere number of degrees of tested eye in the above-mentioned formula; C is mean of cylindrical diopter, i.e. astigmatism degree; Q is an astigmatism axial direction.
3. by some other oculopathy that can also detect the examinee on the captured photo, as the ptosis, anisocoria, buphthalmos, microphthalmia and congenital cataract or the like.
In sum, this photographic apparatus can be easily and fast, economical, objective, generally investigate oculopathy such as child strabismus, anisometropia, ametropia exactly, be suitable for the application of large-scale crowd, have sizable social benefit and economic benefit.
Claims (5)
1, be used for the reflective while photographic apparatus in two fissure type corneas, optical fundus that oculopathy such as medical science ophthalmology stravismus, anisometropia, ametropia check, by double cranny photographic special device (1), zoom lens (2) and photographic apparatus fuselage (3), three formations partly, it is characterized in that: two fissure type photographic apparatus isolated plants (1) front respectively has a photographing slit (4) and illuminating slit (5), photographing slit (4) to be positioned at the centre of isolated plant, and illuminating slit parallels with photographing slit.
2, according to the reflective while photographic apparatus in two fissure type corneas optical fundus of claim (1), its further feature is: the flash lamp tube (7) in illuminating slit (5) dead astern is arranged in the flash lamp tube chamber (8) that prevents light leak.
3, according to the reflective while photographic apparatus in two fissure type corneas, optical fundus of claim 1.Its further feature is: isolated plant (1) joins by engage threads (9) and middle zoom lens (2), and can rotate around camera lens optical axis, its anglec of rotation is controlled by recessed (11) of control that are arranged in the control spring sheet (10) on the isolated plant (1) and be positioned on the zoom lens (2), whenever isolated plant (1) when rotating to a certain angle, control spring sheet (10) engages with control recessed (11), produce " clickly " sound.
4, according to the reflective while photographic apparatus in two fissure type corneas, optical fundus of claim 1, its further feature is: middle zoom lens (2) focal length is 105～210mm.
5, according to the reflective while photographic apparatus in fissure type cornea, the optical fundus of claim 1, it is characterized in that: photographic apparatus fuselage (3) is a single-lens reflex.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86102370 CN1011941B (en) | 1986-04-05 | 1986-04-05 | Double-slit simultaneous camera for reflection of cornea and eyeground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86102370 CN1011941B (en) | 1986-04-05 | 1986-04-05 | Double-slit simultaneous camera for reflection of cornea and eyeground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86102370A CN86102370A (en) | 1987-02-11 |
| CN1011941B true CN1011941B (en) | 1991-03-13 |
Family
ID=4801709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86102370 Expired CN1011941B (en) | 1986-04-05 | 1986-04-05 | Double-slit simultaneous camera for reflection of cornea and eyeground |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1011941B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301681C (en) * | 2002-06-25 | 2007-02-28 | 佳能株式会社 | Ophthalmological camera apparatus |
-
1986
- 1986-04-05 CN CN 86102370 patent/CN1011941B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301681C (en) * | 2002-06-25 | 2007-02-28 | 佳能株式会社 | Ophthalmological camera apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN86102370A (en) | 1987-02-11 |
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| 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 |