WO2016064092A1 - Nouvelle conception de modèle de cristallin oculaire pour correction de réfractomètre visuel, et procédé de correction - Google Patents

Nouvelle conception de modèle de cristallin oculaire pour correction de réfractomètre visuel, et procédé de correction Download PDF

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Publication number
WO2016064092A1
WO2016064092A1 PCT/KR2015/009694 KR2015009694W WO2016064092A1 WO 2016064092 A1 WO2016064092 A1 WO 2016064092A1 KR 2015009694 W KR2015009694 W KR 2015009694W WO 2016064092 A1 WO2016064092 A1 WO 2016064092A1
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WO
WIPO (PCT)
Prior art keywords
model eye
eye lens
standard model
lens
standard
Prior art date
Application number
PCT/KR2015/009694
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English (en)
Korean (ko)
Inventor
서호성
정돈영
윤세원
김병섭
Original Assignee
한국표준과학연구원
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Publication of WO2016064092A1 publication Critical patent/WO2016064092A1/fr

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    • 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
    • A61B3/103—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining refraction, e.g. refractometers, skiascopes
    • 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
    • A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
    • A61B3/028—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters
    • 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
    • A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
    • A61B3/028—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters
    • A61B3/04—Trial frames; Sets of lenses for use therewith
    • 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
    • A61B3/12—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes

Definitions

  • the present invention relates to a new design of a model eye lens for calibrating an optometry refractometer, and more particularly to calibrating an optometry refractometer, a device having a continuous or digital reading device, which is used when measuring the refractive power of an eye.
  • Ophthalmologic examinations include visual acuity, tonometry, and autorefraction.
  • the visual acuity test is a test for measuring how far vision is at a distance.
  • the visual acuity or correction visual acuity of a subject is measured.
  • An intraocular pressure test is a test that measures the change in the surface reflection of the cornea using compressed air. This intraocular pressure test selects glaucoma by measuring a constant intraocular pressure maintained by the inside of the eye.
  • the autorefraction test measures the spherical refractive power, the circular refractive power, the astigmatism side direction, and is a test for correcting visual acuity by checking hyperopia, myopia and astigmatism.
  • Fundus photography is an examination of the retina, the back of the eye.
  • a slit lamp microscope is a test to check the conjunctiva, cornea, anterior, lens, vitreous body, etc. by adjusting the angle of each other with respect to the eye to be examined together with the observation microscope while changing the width and length of the illumination light.
  • the refractive power of the eye measured by the visual refractometer in the automatic refraction test is measured by the value of diopter (P, diopter, unit: D) which is the inverse of the object distance of the eye (distance from the object to the lens).
  • Optometry refractometers are used to test the refractive power of these eyes.
  • the diopter of the eye of the box is specified. Light from an object's distance passes through the lens or lens and refracts to collect at a point on the retina behind the lens. According to this imaging optical principle, the closer the near object is to the retina, the greater the refractive power of the eye lens and the higher the diopter. If light from an object passes 1 m past the lens or lens and then focuses on the retina, the focal length is 1 m and the refractive power is 1 diopter. A focal length of 2 m results in 0.5 diopters. The larger the absolute value of the diopter, the stronger the refractive power of the lens or lens.
  • the optometry optometry refractometer 1 includes an image source 10, an objective lens 20, an aperture 30, an light source 40, a slit 50, a CCD camera 60. It can be configured as.
  • astigmatism non-astigmatism
  • diopter diameter between holes.
  • FIG. 2 is a photograph showing a six-point form of six pinhole images observed by the CCD camera 60
  • FIG. 3 is an astigmatism and diopter using a Nathan image in the six-dot form observed by the CCD camera 60.
  • FIG. It is a schematic diagram showing the principle of measuring.
  • the human eye means that the greater the absolute value of the diopter, the greater the myopia or hyperopia.
  • Hyperopia is corrected by focusing with a convex lens (+), and myopia is corrected by focusing with a concave lens (-).
  • myopia is represented by negative diopters and hyperopia as positive diopters.
  • myopia In the case of myopia, it is classified as mild myopia if it is -3D or less, moderate myopia if -3D to -6D, or high myopia if it is -6D or more. 0D for on-time without wearing glasses.
  • hyperopia it is classified as mild hyperopia if less than + 3D, moderate hyperopia if + 3D to + 6D, and highly hyperopia if more than + 6D.
  • FIG. 4 is a photograph showing a conventional model eye lens
  • Figure 5 is a side cross-sectional view showing a conventional model eye lens.
  • the standard model eye lens can be made of polymethyl methacrylate (PMMA) or optical glass.
  • the front surface is also polished to correspond to the optical finish.
  • the conventional model eye lens may have a cylindrical shape having a refractive surface of about R8 (mm) on the front surface thereof, and a toric contact lens having a semicircular shape as shown in b of FIG. 5 ( It may be configured in the form of a toric contact lens.
  • the rear plane of the standard lens has been defined in KS P ISO 10342: 2002 and ISO 10342: 2003 to be rough polished in a lightly frosted (paint dark gray) so as to serve as a retina.
  • FIG. 6 is a schematic diagram showing a state in which the model eye lens 3 is mounted and tested on an optometry refractometer.
  • a model eye lens 3 having a reference diopter value that can replace a human eye is used to make and correct a measurement to ensure the accuracy of spherical vertex refractive power measurement of an opto-optic refractometer. do.
  • the refractive power of the model eye lens is also a function of its lens length (L), the radius of the front spherical surface (R), the refractive index of the material (n) and the wavelength of light ( ⁇ ).
  • L lens length
  • R radius of the front spherical surface
  • n refractive index of the material
  • ⁇ wavelength of light
  • the refractive power is measured using an optometry refractometer.
  • the refractive power P of the model eye lens is expressed by the following equation.
  • the cylindrical body is configured so that the incident light incident to the front or rear portion can be transmitted in the longitudinal direction, is provided in the front portion of the main body, is configured in a hemispherical configuration so that the incident light can be refracted
  • a standard model eye lens is provided and is provided on one side of the main body, and includes a reticle in the form of a scale configured on an optical axis of the incident light, and is used to calibrate an optometry refractometer. Can be.
  • the organic coupling of the body, the refraction and the reticle has the effect of precisely measuring the focal length of the standard model eye lens.
  • the reticle is formed on the rear portion of the body
  • the reticle is formed on the rear surface, the effect that the reticle phase can be more clearly formed is generated.
  • the reticle has a plurality of scales having a specific thickness in the form of crosses.
  • the reticle including the cross-shaped scale is easy to find the center on the reticle, the effect can be measured more precisely the focal length.
  • the reticle has a plurality of scales having a specific thickness in the form of cross
  • the cross scale to be formed and at least one scale having a specific thickness may include a circle scale configured in a circle shape.
  • the reticle in which the circle scale and the cross scale are combined makes it easy to find the center of the reticle and determine whether the focus is formed, and the effect of measuring the focal length more precisely occurs.
  • the rear surface of the main body may be optically polished to allow the incident light to pass therethrough, and the incident light may be incident from the rear side of the main body to proceed to the front side of the main body.
  • the rear part of the main body is optically polished (polished)
  • an effect of measuring a focal length based on straight light instead of reflected light is generated.
  • optically polished back side of the body can directly attach or coat the reticle.
  • the rear portion of the main body may be characterized in that rough grinding
  • the rear part of the body is rough-polished, the rear part of the rough-grinded body can replace the actual retina of the eye, and the reticle can measure the focal length precisely while creating an environment similar to the measurement of the refractive power of the actual eye. The effect is to be generated.
  • the rough ground back portion of the main body can be directly attached or coated with a reticle.
  • the surface of the rough-grinded rear surface of the main body is adhered via a reticle-coated parallel plate via a refraction matching oil thin film (thickness: W) to produce an effect of precisely measuring a focal length.
  • the diopter measurement error related to the focal length change due to the thickness of the matching oil thin film is corrected. Should give.
  • the present invention has the following effects.
  • the focal length of the standard model eye lens can be measured accurately.
  • 1 is a schematic diagram showing the principle of the optometry refractometer.
  • FIG. 2 is a photograph showing six dot-shaped pinhole images observed by the CCD camera 60 of an optometry refractometer.
  • FIG. 3 is a schematic diagram illustrating the principle of measuring astigmatism and diopter with a pinhole image in the form of six dots observed by the CCD camera 60.
  • FIG. 4 is a photograph showing a conventional model eye lens.
  • FIG. 5 is a side cross-sectional view showing a conventional model eye lens.
  • FIG. 6 is a schematic diagram showing a state in which a model eye lens is mounted and tested on an optometry refractometer.
  • FIG. 7 is a side cross-sectional view illustrating a model eye lens according to an embodiment of the present invention.
  • FIG. 8 is an embodiment of a reticle attached or coated to a rear surface of a model eye lens according to an embodiment of the present invention.
  • FIG. 9 is an embodiment of a model eye lens having a parallel plate coated with a separate reticle on a rear surface of a model eye lens according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram illustrating a diopter measuring apparatus of a model eye lens according to a first embodiment of the present invention.
  • FIG. 11 is a schematic diagram illustrating a diopter measuring apparatus of a model eye lens according to a second exemplary embodiment of the present invention.
  • FIG. 12 is a schematic diagram illustrating a diopter measuring apparatus of a model eye lens according to a third embodiment of the present invention.
  • FIG. 13 is a schematic diagram illustrating definition of diopter values of a model eye lens of the present invention.
  • FIG. 7 is a side cross-sectional view illustrating a model eye lens according to an embodiment of the present invention.
  • the model eye lens 5 according to the exemplary embodiment of the present invention may have a cylindrical shape, and one surface may have a hemispherical surface providing refractive power.
  • the other surface of the model eye lens 5 according to an embodiment of the present invention may be configured not only in the rough grinding of the prior art, but also optical polishing (polishing) to allow the light to pass through, in one embodiment of the present invention It is proposed a method of attaching the reticle to both the rough-polished rear plane and the optically polished rear plane of to form an image of the reticle to measure the position of the image plane.
  • FIGS. 7C and 7D illustrate a standard in which the rear part is optically polished (polished) and attached to the reticle on its face according to an embodiment of the present invention.
  • a model eye lens is shown.
  • a reticle 7 may be formed or coupled to one surface or the other surface of the standard model eye lens 5 according to the exemplary embodiment of the present invention.
  • 8 is a schematic diagram showing a reticle according to an embodiment of the present invention. As shown in FIG. 8, the reticle 7 according to an embodiment of the present invention may be configured in various forms. As the reticle 7 is formed or coupled to at least one of one surface and the other surface of the standard model eye lens 5, the refractive power of the diopter measuring device of the following standard model eye lens can be more easily measured.
  • the reticle 7 of the standard lens 5 may have a cross shape having a thickness and an interval of 10 ⁇ m.
  • the reticle (Fig. 7) of the standard model eye lens (Fig. 5 or Fig. 9) according to an embodiment of the present invention as shown in Fig. 8 (b) has a thickness of 10 ⁇ m and a diameter of 4 mm, 8 mm It may further comprise a circular scale consisting of.
  • Table 1 describes an embodiment of a focal length, a vertex distance, a diopter value when the VD length is 0 mm, and a length.
  • the length of the standard model eye lens is obtained by calculating the minimum square root focus using geometric optical simulation software.
  • the diopter value is changed according to Equation 2, and the corrected lens length value may be changed.
  • FIG. 10 a standard model eye lens diopter measuring apparatus (FIG. 10) using a standard model eye lens (FIG. 5 or FIG. 9) according to an exemplary embodiment will be described.
  • Diopter measuring device of standard model eye lens Diopter measuring device of standard model eye lens
  • FIG. 10 is a schematic diagram showing the diopter measuring apparatus of the standard lens according to the first embodiment of the present invention.
  • the diopter measuring apparatus of the standard model eye lens according to the first embodiment of the present invention may include an adjusting telescope 120, a light source 110, a collimator 100, and the like.
  • a standard model eye lens 3 used in the diopter measuring apparatus of the standard lens according to the first embodiment a standard model eye lens having an optical polishing on the rear surface may be used.
  • the light source 110 is configured to irradiate light such as LED light or laser light in the longitudinal direction of the standard model eye lens 3 to the rear surface of the standard model eye lens 3.
  • Light irradiated from the light source 110 can be passed through the rear surface of the polished standard model eye lens 3 to the spherical front surface of the standard model eye lens 3, and the light source 110 is passed through the standard model eye lens 3.
  • the adjusting telescope 120 can easily measure the diopter of the standard model eye lens 3.
  • the collimator 100 is an optical device for forming parallel rays by being disposed in front of the LED light source where the dispersion of light occurs.
  • the LED light passing through the relimer 100 is formed close to the parallel light and is irradiated to the rear portion of the standard model eye lens 3.
  • the LED light near the parallel light passes through the zero diopter standard model eye lens 3, it still proceeds to the parallel light.
  • Passage through standard model eye lenses, rather than zero diopters, produces divergent light that is either focused on a focal plane or from a flat plane of distance.
  • the adjusting telescope 120 is an optical component which checks whether the standard model eye lens 3 is focused by using the light passing through the standard model eye lens 3 in the longitudinal direction.
  • the adjusting telescope 120 may check whether the target light is focused by the naked eye or a CCD camera, and the user may image the hyperplane point of the adjusting telescope 120 by the surface of the standard model eye lens 3 and the LED light illuminated on the reticle.
  • the focal length of the standard model eye lens 3 can be confirmed by measuring the distance between the points.
  • Figure 10 11 is a schematic diagram showing a diopter measuring apparatus of the standard lens according to the second embodiment of the present invention.
  • the diopter measuring apparatus of the standard model eye lens according to the second exemplary embodiment of the present invention is the same as the first exemplary embodiment of the present invention, the adjusting telescope 120, the light source 110, and the collimator 100.
  • the diopter measuring apparatus of the standard model eye lens according to the second embodiment of the present invention in which the reticle is attached to the rear surface of the standard model eye lens 3 to which the reticle is additionally attached, may be included.
  • the rear part may be used for a standard lens which is optically polished (polished) and a reticle is attached to the rear part.
  • the user can more accurately check the focal length of the standard model eye lens 3.
  • FIG. 12 is a schematic diagram showing the diopter measuring apparatus of the standard lens according to the third embodiment of the present invention.
  • the diopter measuring apparatus for the standard lens according to the third exemplary embodiment of the present invention is similar to the first exemplary embodiment of the present invention, such as an adjusting telescope 120, a light source 110, a collimator 100, and the like. It may be included, in addition, a device for measuring the distance with a laser interferometer (140, laser interferometer) or a linear scale may be further formed. According to the third embodiment of the present invention, if the interferometer is used as the moving distance of the reticle 130, the user can more accurately check the focal length of the standard lens 3.
  • a laser interferometer 140, laser interferometer
  • FIG. 12 is a schematic diagram of calculating the diopter of the standard lens by using a diopter measuring apparatus of the standard model eye lens according to an embodiment of the present invention.
  • the focal length d of the standard model eye lens is precisely measured by the diopter measuring apparatus of the standard lens according to the exemplary embodiment of the present invention, and the inverse of the measured focal length d is taken.
  • the diopter P can be calculated.

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  • Health & Medical Sciences (AREA)
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  • Ophthalmology & Optometry (AREA)
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Abstract

La présente invention concerne un modèle de cristallin oculaire standard pour un réfractomètre visuel optométrique et, plus spécifiquement, un modèle de cristallin oculaire standard destiné à être utilisé lors de la correction du réfractomètre visuel optométrique, qui est un dispositif ayant un dispositif de lecture continue ou numérique destiné à être utilisé lors de la mesure de la réfraction des yeux. À cet effet, la présente invention peut comprendre : un modèle de cristallin oculaire standard dont la partie de surface arrière présente un polissage rugueux et un réticule est attaché ou revêtu sur la surface à polissage rugueux de celui-ci ; ou un modèle de cristallin oculaire standard dont la partie de surface arrière est optiquement polie et un réticule est fixé ou revêtu sur la surface optiquement polie de celui-ci. Par conséquent, la présente invention produit un effet permettant la mesure précise de la distance d'un modèle de cristallin oculaire standard.
PCT/KR2015/009694 2014-10-24 2015-09-16 Nouvelle conception de modèle de cristallin oculaire pour correction de réfractomètre visuel, et procédé de correction WO2016064092A1 (fr)

Applications Claiming Priority (2)

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KR10-2014-0145249 2014-10-24
KR1020140145249A KR101538129B1 (ko) 2014-10-24 2014-10-24 검안용 굴절력계용 표준렌즈

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10276985A (ja) * 1997-03-27 1998-10-20 Carl Zeiss Jena Gmbh 眼球の光学的データの検査装置
JP2001095760A (ja) * 1999-09-28 2001-04-10 Topcon Corp 眼の光学特性測定装置
KR20090012352A (ko) * 2006-05-05 2009-02-03 코닝 인코포레이티드 준-텔레센트릭 이미징 렌즈의 왜곡 조정
KR100923059B1 (ko) * 2006-06-06 2009-10-22 후지논 가부시키가이샤 편심량 측정 방법
KR101299744B1 (ko) * 2005-12-01 2013-08-23 가부시키가이샤 니데크 렌즈 미터

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10276985A (ja) * 1997-03-27 1998-10-20 Carl Zeiss Jena Gmbh 眼球の光学的データの検査装置
JP2001095760A (ja) * 1999-09-28 2001-04-10 Topcon Corp 眼の光学特性測定装置
KR101299744B1 (ko) * 2005-12-01 2013-08-23 가부시키가이샤 니데크 렌즈 미터
KR20090012352A (ko) * 2006-05-05 2009-02-03 코닝 인코포레이티드 준-텔레센트릭 이미징 렌즈의 왜곡 조정
KR100923059B1 (ko) * 2006-06-06 2009-10-22 후지논 가부시키가이샤 편심량 측정 방법

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