SU1082424A1 - Eye model - Google Patents

Eye model Download PDF

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Publication number
SU1082424A1
SU1082424A1 SU823410175A SU3410175A SU1082424A1 SU 1082424 A1 SU1082424 A1 SU 1082424A1 SU 823410175 A SU823410175 A SU 823410175A SU 3410175 A SU3410175 A SU 3410175A SU 1082424 A1 SU1082424 A1 SU 1082424A1
Authority
SU
USSR - Soviet Union
Prior art keywords
lens
recorder
chamber
body
refractive indices
Prior art date
Application number
SU823410175A
Other languages
Russian (ru)
Inventor
Руслан Самуилович Ошеров
Михаил Михайлович Таджиков
Original Assignee
Osherov Ruslan S
Tadzhikov Mikhail M
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Osherov Ruslan S, Tadzhikov Mikhail M filed Critical Osherov Ruslan S
Priority to SU823410175A priority Critical patent/SU1082424A1/en
Application granted granted Critical
Publication of SU1082424A1 publication Critical patent/SU1082424A1/en

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/14Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/14Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
    • A61F2/141Artificial eyes

Abstract

EYE MODEL, comprising a body divided by a partition into front and rear chambers, a lens and an aperture with a variable aperture installed in the anterior chamber, and a recorder. characterized in that, in order to increase the reliability of the simulation, it is provided with optical fibers mounted on the inner surface of the posterior chamber that imitate the retina and are connected with. the recorder, while the lens is made of elastic material, its end is connected through an actuator with the recorder, the cavities of the anterior chamber, the lens and the posterior chamber are filled with liquids with refractive indices equal to the refractive indices of the moisture of the lenticular body of the lens and the gelatinous vitreous body of the human eye, respectively.

Description

The invention relates to medicine, in particular to medical aids, as well as research instruments for studying retinal imaging, physiology and vision pathology. Known functional models that demonstrate the work of individual parts of the eye. Such a device includes an element imitating the cornea, an iris diaphragm associated with the photosensitive unit, an optical element representing the lens, and a recording device in the form of a film imitating the retina of the eye. Depending on the amount of light falling on the optical element, a narrowing or widening of the orifice of the diaphragm 1 occurs. The known device is the simplest model that imitates only one aspect of the pupil of the eye (narrowing - widening) without regard to its morphological features. Closest to the proposed technical essence and the achieved result is a model of the eye, comprising a body divided by a partition into anterior and posterior chambers, a lens mounted in the anterior chamber and a diaphragm with a variable aperture and the recorder 2. The specified device does not provide sufficient consistency and reliability because of the fact that it does not take into account a number of structural features of the individual elements of the eye, the presence of water in the net between the cornea and the lens, the transparent cartilage the body of the lens, the gelatinous vitreous body, also the phenomenon of aKKOidation is not taken into account. The purpose of the invention is to increase the reliability of modeling. This goal is achieved by the fact that the model of the eye, comprising a body divided by a partition into anterior and posterior chambers, a lens and a diaphragm with a variable aperture installed in the anterior chamber, and a recorder, is provided with optical fibers imitating the retina on the inner surface of the posterior chamber. the lens is made of elastic material, its end is connected via an actuator with the recorder, and the anterior chamber cavities, the lens and the posterior chamber are filled with liquids with refractive indices equal to the refractive indices of the moisture of the lenticular body of the crystalline lens and the gelatinous vitreous body of the human eye, respectively. The drawing shows the proposed device. The housing 1 of the device is divided by a partition 2 into the front 3 and rear 4 chambers. The anterior chamber is filled with a transparent liquid with a refractive index equal to that of the aqueous humor of the eye. The anterior chamber contains an iris diaphragm 5, controlled by a photodiode 6 through a reversible motor 7. A barrier 8 is embedded in a lens 8 made of an elastic material and filled with a transparent liquid with a refractive index equal to the refractive index of the transparent rhinoid body of the eye crystalline lens. Lens 8 has feedback through the actuator 9 (reversing motor) with the recorder 10. The back chamber 4 is filled with a clear liquid with a refractive index equal to the refractive index of the gelatinous vitreous body of the eye. The inner surface of the posterior chamber, simulating the retina, is provided with fiber optic fibers 11, the outputs of which are assembled in a bundle placed opposite the Fabry 2 lens. A photodetector 13, an amplifier 14, a matching device 15 and a recorder 10 are placed in the form of a computer. The illuminated object 16 or a light source is placed in front of the housing 1. The device operates as follows. The light from the object 16 or the source passes through the front camera 3, the aperture 5, the lens 8, the rear camera 4 and hits the input ends of the optical fibers 11. Passing through the optical fibers, the light is collected by the Fabry lens 12, and then the light spot is scanned by the photoreceiver 13. The resulting an electrical signal, the magnitude of which is proportional to the illumination of the inner surface of the rear chamber 4, is fed to the amplifier 14 and through a matching device to the recorder 10, on the screen of which the image formation on the internal screen is reproduced nney rear chamber surface. A change in the illumination conditions of the object or the intensity of the light source is detected by a photodiode 6, connected via a reversing motor 7 with a diaphragm 5. With increasing illumination, the aperture opening decreases, and decreases with increasing. The signal giving the command to change the curvature of the lens 8, when it is removed or when an object or a light source approaches the body, is removed when scanning from the center of the light spot and is fed to the actuator 9 (reversing motor) from the recording unit 10. If the light rays are focused in front of the inner the surface of camera 4 or behind it, the center of the light spot turns out to be blurry and the electric motor rotates in one direction or another, changing the curvature of the lens. When the focus is removed from the inner surface, the lesser amount of light falls into its central part, as a result of which a decrease in the output signal causes a change in the direction of rotation of the motor, which causes the focus to move in the opposite direction. By focusing the light rays on the inner surface of the chamber 4, the output signal is maximum and the rotation of the electric motor is stopped. Using fluids with different refractive indices, it is possible to simulate pathological changes in vision. The proposed device makes it possible to model with major accuracy the main aspects of the eye's work: contraction - pupil dilation depending on the illumination, its accommodation b depending on the distance to the object, the principle of image formation on the retina. In this case, all nodes do not require manual control, but operate automatically. The device makes it possible to demonstrate not individual aspects of vision, but the whole complex of image formation in natural conditions. According to preliminary calculations, the modeling accuracy compared with the prototype increases 12-15 times, the reliability is 60-80% compared with the human eye and depends on the configuration of the ends of the optical fibers and the absorption in them. The proposed device is not only an advanced tool, but also a research instrument for studying the physiology and pathology of vision.

Claims (1)

  1. EYE MODEL, comprising a housing divided by a partition into front and rear chambers, a lens and a diaphragm with a variable orifice in the anterior chamber, and a recorder,
    characterized in that, in order to increase the reliability of the simulation, it is equipped with optical fibers mounted on the inner surface of the posterior chamber, simulating the retina and associated with. the recorder, while the lens is made of elastic material, its end is connected through an actuator with the recorder, and the cavity of the anterior chamber, lens and rear chamber are filled with liquids with refractive indices equal to the refractive indices of the crystalline lens body and gelatinous vitreous body of the human eye, respectively.
    1082424
    one
SU823410175A 1982-03-15 1982-03-15 Eye model SU1082424A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU823410175A SU1082424A1 (en) 1982-03-15 1982-03-15 Eye model

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU823410175A SU1082424A1 (en) 1982-03-15 1982-03-15 Eye model

Publications (1)

Publication Number Publication Date
SU1082424A1 true SU1082424A1 (en) 1984-03-30

Family

ID=21002130

Family Applications (1)

Application Number Title Priority Date Filing Date
SU823410175A SU1082424A1 (en) 1982-03-15 1982-03-15 Eye model

Country Status (1)

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SU (1) SU1082424A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4762496A (en) * 1987-02-13 1988-08-09 William F. Maloney Ophthalmologic lens phantom system
US4762495A (en) * 1987-02-13 1988-08-09 Maloney William F Ophtalmologic lens phantom system
WO1988006329A1 (en) * 1987-02-13 1988-08-25 Maloney William F Ophthalmologic phantom system
US4865552A (en) * 1987-02-13 1989-09-12 William F. Maloney Ophthalmologic phantom system
US4865551A (en) * 1987-02-13 1989-09-12 Maloney William F Ophthalmologic phantom system
US5137459A (en) * 1989-10-28 1992-08-11 Mathias Zirm Device for conducting experimental eye operations
US5893719A (en) * 1997-10-29 1999-04-13 Radow; Brett K. Variable pathological and surgical eye model and method related thereto

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
1. Патент US № 3905130, кл. 35-17, опублик. 1978. 2. Патент US № 3177593, кл. 35-17, опублик. 1975 (прототип). *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4762496A (en) * 1987-02-13 1988-08-09 William F. Maloney Ophthalmologic lens phantom system
US4762495A (en) * 1987-02-13 1988-08-09 Maloney William F Ophtalmologic lens phantom system
WO1988006329A1 (en) * 1987-02-13 1988-08-25 Maloney William F Ophthalmologic phantom system
US4865552A (en) * 1987-02-13 1989-09-12 William F. Maloney Ophthalmologic phantom system
US4865551A (en) * 1987-02-13 1989-09-12 Maloney William F Ophthalmologic phantom system
US5137459A (en) * 1989-10-28 1992-08-11 Mathias Zirm Device for conducting experimental eye operations
US5893719A (en) * 1997-10-29 1999-04-13 Radow; Brett K. Variable pathological and surgical eye model and method related thereto

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