• Title/Summary/Keyword: Ophthalmic

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Optical Consequences of Korean Craniofacial Features

  • Kwok, L. Stephen;Kim, Douk-Hoon
    • Journal of Korean Ophthalmic Optics Society
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    • v.10 no.2
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    • pp.99-101
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    • 2005
  • This review of the Korean eye anatomy suggests that there may be unsuspected links between anatomical characteristics of the eye and orbit, and optical performance.

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The optical properties on the human model eye (모형 안의 광학적 성능)

  • Lim, Hyeonseon;Ji, Taeksang;Kim, Bonghwan;Kim, Sejin;Yoon, Sungro
    • Journal of Korean Ophthalmic Optics Society
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    • v.7 no.2
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    • pp.203-207
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    • 2002
  • In this study, by using the eye model of NAVARRO, KOOIJMAN, MAHKICHOONG, the properties of optical system are reserched in a finite ray tracing method, when ametropia is corrected by glasses or contact lens, this study is useful as a reference. Also, when Auto-refractometer for refraction test and Keratomeler are designed, these eye models can be used.

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Review of the Polycarbonate (Polycarbonate의 고찰)

  • Choi, Gei-Hun
    • Journal of Korean Ophthalmic Optics Society
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    • v.9 no.2
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    • pp.313-322
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    • 2004
  • Glasses are to be classified in organic glasses and inorganic glasses. Generally, we just call glasses instead of calling inorganic glasses and call synthetic resin or plastic instead of calling organic glasses. One of the ophthalmic plastic glasses develops into polycarbonate resin in organic glasses. Recently, polycarbonate resin is widely known because it has larger index and impact than plastic lens. Ours study analyzed about polycarbonate resin in ophthalmic substance.

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The Refractive Index Measurement Using Total Reflection (전반사를 이용한 굴절률 측정)

  • Lee, Won Jin;Park, Hae Jung;Lee, Myung Ho
    • Journal of Korean Ophthalmic Optics Society
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    • v.1 no.1
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    • pp.103-108
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    • 1996
  • In this experiments, we introduce the simple method measuring the refractive index and it measured for severial materials compare with real values. Refractive index of distillation water, ethyl alcohol and acryl were $1.32{\pm}0.006$, $0.36{\pm}0.01$ and $0.48{\pm}0.005$, respectively.

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Review of the plastic ophthalmic lens (플라스틱 안경렌즈에 관한 고찰)

  • Kim, Sang Yeoun
    • Journal of Korean Ophthalmic Optics Society
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    • v.1 no.1
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    • pp.65-72
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    • 1996
  • The general property of plastic ophthalmic lens has been reviewed by the optical property and polymer structure. A PMMA which is synthesized by the polymerization of monomers of two or more kinds is termed a copolymer, and the main chain composes a skeleton of molecular structure in the polymer. Refraction index of polymer was governed mainly by the polarization of molecular and was followed to increase it conspicuously as Cl, Br, and Iodine was substitude to hydrogen. Thermal dependence of refraction index of polymer show that the higher distinctive characteristic than glass material.

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Function of Medical device on spectacle frame (안경테의 의료용구적기능)

  • Kang, H.S.;Seo, Y.W.;Kang, I.S.
    • Journal of Korean Ophthalmic Optics Society
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    • v.1 no.1
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    • pp.41-51
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    • 1996
  • According to Korean pharmaceutic law, spectacles is a kind of medical device or instrument that is composed of a front and two temples with a pair of lenses. If the spectacle is not worn, it is a kind of optical device, but if it were worn, it will makes a new optical system to correct ametropia. Therefore, spectacles must be carried on by dispensing opticians.

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Visible Light Spectrum of H2 Plasma Generated a Commercial Electric Power in the Parallel Plate Reactor (상용전원 평행판전극 방전장치에서 수소플라스마의 가시광선스펙트럼)

  • Choi, Woon Sang;Ji, Taek Sang;Kang, Sung Soo
    • Journal of Korean Ophthalmic Optics Society
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    • v.4 no.1
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    • pp.15-20
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    • 1999
  • Visible light spectrum emitted from $H_2$ plasma in the parallel plate reactor using a commercial electric power are investigated by optical emission spectroscopy. Intensity of visible light is measured as a function of $H_2$ pressure and discharging power, and the intensity is compared with plasma density measured with the probe. As a result, the intensity is affected by plasma density and the plasma density is controlled the $H_2$ pressure and the discharging power.

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Ruptured Aneurysm of the Ophthalmic Artery

  • Seo, Won-Duck;Hong, Dae-Young;Kim, Young-Don;Yeo, Hyung-Tae
    • Journal of Korean Neurosurgical Society
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    • v.40 no.2
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    • pp.128-130
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    • 2006
  • Aneurysms arising from the ophthalmic artery itself are very rare compared with aneurysms originating from the bifurcation of the ophthalmic artery and carotid artery. There was only one reported case of a ruptured aneurysm of the ophthalmic artery itself. We discuss clinical significance of an aneurysm at this site, as well as the role of three dimentional image of multislice computed tomography angiogram[3D-image of MCTA] in determining the cause of subarachnoid hemorrhage[SAH].