WO1995023550A1 - Appareil d'observation du globe oculaire - Google Patents
Appareil d'observation du globe oculaire Download PDFInfo
- Publication number
- WO1995023550A1 WO1995023550A1 PCT/JP1995/000246 JP9500246W WO9523550A1 WO 1995023550 A1 WO1995023550 A1 WO 1995023550A1 JP 9500246 W JP9500246 W JP 9500246W WO 9523550 A1 WO9523550 A1 WO 9523550A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- eyeball
- lens group
- image
- optical system
- eye
- Prior art date
Links
Classifications
-
- 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
- A61B3/14—Arrangements specially adapted for eye photography
- A61B3/145—Arrangements specially adapted for eye photography by video means
-
- 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
- A61B3/113—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining or recording eye movement
Definitions
- the present invention relates to an eyeball observation apparatus used for observing and measuring the position of an eyeball. More specifically, the tip of the objective lens group comes into contact with the eyeball, and the eyeballs such as the fundus, the vitreous body, the anterior crystalline body, the posterior lens, the corneal endothelium or the corneal epithelium are examined. Eye observation device used for measurement of position and position
- the eyeball observation apparatus 1 includes an illumination optical system 7 for illuminating an eye to be inspected, an eyepiece lens group 4, and reflection from the eye to be inspected. From the objective lens 8 and the imaging lens group 9 with the cone lens 15 contacting the eyeball 6, which directs the image light to the imaging plane 10 And a photographing optical system 2 and a photographing machine 3.
- 11 is a convex lens group
- 2 is a concave lens group
- 13 is a motor that moves the convex lens group 11 along the optical axis. Is a rotary encoder for counting the number of rotations of the motor 13.
- the motor 13 When imaging the image rays reflected from the eye to be inspected on the imaging surface 10, the motor 13 should be moved so that the image from the camera 3 becomes clear.
- the adjustment is performed by moving the convex lens group 11 on the optical axis by driving.
- the examiner looks at the images so that the images from 3 A part of the imaging lens 9 of the photographing optical system 2 is moved on the optical axis, and this movement is performed by a switch (not shown) that is electrically connected. It takes a long time for the patient to perform the test, and during that time, the lamp that illuminates the subject's eye is turned on, so the subject has a heavy burden There is a problem. In addition, the switch must be operated each time the eye to be examined moves, which imposes a heavy burden on the examiner.
- the present invention has been made in order to solve such a problem, and provides an eyeball observation apparatus capable of rapidly obtaining a clear image of a desired part of the eyeball. This is the purpose. Disclosure of invention
- An eyeball observation device includes an illumination optical system for illuminating a test site, and an eye contacting an eyeball for causing an image light beam coming from the test site to reach an imaging plane.
- An eyeball observation device having an imaging lens system including an objective lens and an imaging lens group having a transparent body, and a camera. It is characterized by the fact that an ultrasonic transducer for detecting the position of the optometry is not provided.
- At least one of the optical member of the imaging optical system or at least one of the imaging devices is used. It may have moving means for moving on the optical axis.
- the ultrasonic vibrator for detecting the position of the eye to be inspected is provided on the transparent body in contact with the eyeball in the objective lens group, the ultrasonic vibration Quickly and accurately detect the position of the desired site simply by measuring the time it takes for the ultrasonic waves emitted from the child to reflect back to the target and return It is possible . Based on the detection result of this position, if the examiner adjusts the imaging optics etc. so that the image is formed on the image plane manually or electrically, the image of the desired part is quickly and clearly It is selected.
- At least one of the optical member of the photographing optical system or at least one of the photographing machines is automatically moved on the optical axis by the moving means. If the image is formed on the image plane, the image of the desired part can be obtained more quickly and clearly.
- FIG. 1 is an optical path diagram showing one embodiment of the eyeball observation device of the present invention.
- FIG. 2 is a block diagram showing a system configuration of the eyeball observation device of FIG.
- FIG. 3 is a schematic diagram of an operation panel equipped with an operation switch of the eyeball observation device of FIG.
- FIG. 4 is an explanatory diagram showing the relationship between the distance from the ultrasonic transducer in FIG. 1 and the echo strength.
- FIG. 5 is an optical path diagram of a conventional eyeball observation device.
- BEST MODE FOR CARRYING OUT THE INVENTION An eyeball observation device according to the present invention will be described with reference to the accompanying drawings as best modes for carrying out the invention.
- reference numeral 1 denotes an eyeball observation device, which is an illumination optical system 7 for illuminating an eyeball 6 and an eyepiece lens for directly observing the subject's eye by visual observation.
- Objective lens with 5 The imaging system includes an imaging optical system 2 including a group 8 and an imaging lens group 9, and an imaging device 3.
- 11 to 14 are the same elements as those indicated by reference numerals 11 to 14 in FIG.
- the ultrasonic transducer 16 faces the eyeball 6 on the cone lens 15 and the surface of the cone lens 15 on the camera side is located on the cone lens 15. It is attached to the top, for example, by being closely attached.
- the photographing optical system 2, the photographing machine 3, the eyepiece lens group 4 and the illumination optical system 7 are housed in a case 5.
- the case 5 containing all the photographing means can be moved (full floating) along the optical axis of the photographing optical system 2 on the body frame (not shown). It is supported as such. It is also possible to fix the case 5 to the frame of the main unit without moving the lens to the nose, so that only the objective lens group 8 of the photographic optical system can be moved. .
- the imaging lens group 9 forms an image light beam transmitted through the objective lens group 8 on the imaging plane 10 in the photographing machine 3 on the optical axis. It is composed of a convex lens group (object lens 8 side) 11 and a concave lens group (imaging plane 10 side) 12 which are set apart from each other. It is. In addition, the convex lens group 11 has a point output function because it can be moved on the optical axis by using the driving force of the motor 13. are doing .
- the system of the eyeball observation device 1 is configured as shown in FIG.
- the ultrasonic vibrator 16 converts mechanical energy such as a ceramic vibrator or a polymer vibrator and electric energy into and out of each other.
- Piezoelectric materials are used, for example, for corneal observation and measurement, the measurement range is 0 to 2000 / m, Measurement accuracy of ⁇ 5 / m and oscillation frequency of about 10 to 30 MHz can be used.
- the ultrasonic vibrator 16 is provided on the camera side of the cone lens 15, but as a cone lens, a plastic lens, For example, select a lens made of a material with good ultrasonic transparency, such as polycarbonate or PMMA, and closely attach the ultrasonic vibrator 16 to the surface with an adhesive. By sticking them together, it is possible to detect the position of the eyeball without interfering with the use of a cone lens.
- a plastic lens For example, select a lens made of a material with good ultrasonic transparency, such as polycarbonate or PMMA, and closely attach the ultrasonic vibrator 16 to the surface with an adhesive. By sticking them together, it is possible to detect the position of the eyeball without interfering with the use of a cone lens.
- the eye to be examined is caused to fixate the illuminating light, and the visual axis is captured by ultrasound, so that the corneal epidermis, the corneal endothelium, the anterior lens, and the posterior lens are echoed in this order.
- the positional relationship shown in Table 1 it is possible to selectively detect the desired test site of the eyeball.
- the selection switch 19 on the operation panel 18 in FIG. 3 is operated. Select the test site. If selected, the settings that have been input in advance from the test site to the tip of the cone lens 15 by the arithmetic circuit 17 shown in FIG. The distance is calculated, and the convex lens group 11 moves on the optical axis based on the set distance.
- the corneal protective solution P is dropped on the cornea of the eye to be examined, and then the entire case 5 is moved to the eyeball 6 side, and the cone lens 15 of the eyeball observation apparatus is applied to the cornea. Make contact.
- the ultrasonic wave is oscillated from the ultrasonic transducer 16 that has been shaken, the echo shown in FIG. 4 is detected.
- the corneal thickness that is, the distance (520 m) from the corneal epidermis to the corneal endothelium, is simultaneously measured and displayed on a monitor or the like (see FIG. Not shown).
- the distance from the tip of cone lens 15 to the corneal endodermis L 600 / zm (measured corneal protective fluid).
- the motor 13 stops rotating.
- the position of the convex lens group 11 is adjusted in accordance with the measured distance L, accurate focusing can be performed, and a clear image of the corneal endothelium can be obtained.
- L since L> L0, the convex lens group 11 moves to the image plane 10 side.
- L ⁇ LO the lens moves away from the image plane 10.
- the operation panel shown in FIG. 3 is provided with a set distance change switch 20 so that various types of test sites can be input. If you want to change the settings, for example, press the setting switch 19 you want to change, then press the reset button 21 to change the setting. Operate touch 20 to change the set distance.
- the brightness of the lamp illuminating the subject's eye can be adjusted as appropriate by operating the illumination light volume knob 23.
- the illumination light may be turned on (flash) only during shooting.
- the convex lens group 11 of the imaging lens group 9 is moved on the optical axis using a moving means such as a rotary motor 13 at a time.
- a moving means such as a rotary motor 13
- Other optical components of the taking optical system 2 for example, part of the concave lens group 12 or the objective lens group 8) or May move camera 3.
- the optical distance may be adjusted as appropriate by using a piezoelectric actuator that generates a linear driving force as a moving means, or by using an electromagnetic induction linear motor. Change the point and align the points.
- the ultrasonic vibrator for detecting the portion to be inspected is attached to the transparent body that comes into contact with the eyeball of the objective lens group, the position detection result is obtained. Thus, it is possible to quickly obtain a clear image of a desired portion based on the image.
- the subject is free from long-lasting glare of the illumination light.
- the examiner has an excellent effect of observing a clear image without any operation.
- it is of great clinical significance to be able to simultaneously and quickly obtain images of the corneal endothelium and the like at the site to be observed and the corneal thickness at the same time. is there .
- the eyeball observation device of the present invention has two functions of observing the eyeball and measuring the position of the eyeball, so that it can save space in hospitals and hospitals. It is also effective. Industrial applicability
- the eyeball observation device of the present invention can obtain a clear and quick image of the observed part of each part of the eyeball, and can also measure the position of the eyeball. It is used for examinations in ophthalmologic treatments such as preoperative and postoperative examinations of corneal refractive surgery, and for data collection that is the basis for selecting an intraocular lens. Yes.
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Biophysics (AREA)
- Ophthalmology & Optometry (AREA)
- Biomedical Technology (AREA)
- Veterinary Medicine (AREA)
- Medical Informatics (AREA)
- Physics & Mathematics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
- Eye Examination Apparatus (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95909123A EP0697189A4 (en) | 1994-03-01 | 1995-02-20 | EYE GLOBE OBSERVATION APPARATUS |
US08/537,696 US5812240A (en) | 1994-03-01 | 1995-02-20 | Eyeball observing device having an ultrasonic detector |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6/31180 | 1994-03-01 | ||
JP6031180A JPH07236613A (ja) | 1994-03-01 | 1994-03-01 | 眼球観察装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995023550A1 true WO1995023550A1 (fr) | 1995-09-08 |
Family
ID=12324256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1995/000246 WO1995023550A1 (fr) | 1994-03-01 | 1995-02-20 | Appareil d'observation du globe oculaire |
Country Status (4)
Country | Link |
---|---|
US (1) | US5812240A (ja) |
EP (1) | EP0697189A4 (ja) |
JP (1) | JPH07236613A (ja) |
WO (1) | WO1995023550A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0790799A1 (en) * | 1994-11-17 | 1997-08-27 | Research Development Foundation | Eye imaging system |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004518517A (ja) * | 2001-04-09 | 2004-06-24 | エスアイエス アクチェンゲゼルシャフト サージカル インストルメント システムズ | 眼の角膜厚みの測定方法および装置 |
WO2007059292A2 (en) * | 2005-11-16 | 2007-05-24 | Schachar Ronald A | Apparatus and method for measuring scleral curvature and velocity of tissues of the eye |
CN101474061B (zh) * | 2008-01-03 | 2011-07-20 | 北京宏仁凝瑞科技发展有限公司 | 一种接触式眼底成像系统 |
US10806341B2 (en) * | 2014-08-20 | 2020-10-20 | California Baptist University | Systems and methods for monitoring eye health |
US11806078B1 (en) | 2022-05-01 | 2023-11-07 | Globe Biomedical, Inc. | Tear meniscus detection and evaluation system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5560435A (en) * | 1978-10-30 | 1980-05-07 | Canon Kk | Ophthalmologic machine provided with positional detector |
JPS58127629A (ja) * | 1982-01-25 | 1983-07-29 | 株式会社トプコン | 眼科器械の自動合焦装置 |
JPS6264331A (ja) * | 1985-09-13 | 1987-03-23 | キヤノン株式会社 | 眼科計測装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5412194A (en) * | 1977-06-29 | 1979-01-29 | Canon Kk | Ophthalmologic instrument |
US4764006A (en) * | 1985-09-13 | 1988-08-16 | Canon Kabushiki Kaisha | Ophthalmic measuring apparatus |
US5325135A (en) * | 1987-03-06 | 1994-06-28 | Canon Kabushiki Kaisha | Ophthalmologic apparatus having two measuring systems |
EP0315160B1 (en) * | 1987-11-02 | 1995-02-08 | Canon Kabushiki Kaisha | Ultrasonic ophthalmic measuring apparatus |
JPH0531077A (ja) * | 1991-02-15 | 1993-02-09 | Toomee:Kk | 眼球観察装置 |
-
1994
- 1994-03-01 JP JP6031180A patent/JPH07236613A/ja active Pending
-
1995
- 1995-02-20 WO PCT/JP1995/000246 patent/WO1995023550A1/ja not_active Application Discontinuation
- 1995-02-20 US US08/537,696 patent/US5812240A/en not_active Expired - Fee Related
- 1995-02-20 EP EP95909123A patent/EP0697189A4/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5560435A (en) * | 1978-10-30 | 1980-05-07 | Canon Kk | Ophthalmologic machine provided with positional detector |
JPS58127629A (ja) * | 1982-01-25 | 1983-07-29 | 株式会社トプコン | 眼科器械の自動合焦装置 |
JPS6264331A (ja) * | 1985-09-13 | 1987-03-23 | キヤノン株式会社 | 眼科計測装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0790799A1 (en) * | 1994-11-17 | 1997-08-27 | Research Development Foundation | Eye imaging system |
EP0790799A4 (en) * | 1994-11-17 | 1999-02-03 | Res Dev Foundation | SYSTEM FOR OBTAINING AN IMAGE OF THE EYE |
Also Published As
Publication number | Publication date |
---|---|
US5812240A (en) | 1998-09-22 |
EP0697189A4 (en) | 1998-11-04 |
EP0697189A1 (en) | 1996-02-21 |
JPH07236613A (ja) | 1995-09-12 |
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