• 제목/요약/키워드: ophthalmic lens

검색결과 521건 처리시간 0.026초

Silicone을 이용한 콘택트렌즈 재료의 중합 (Polymerization of Contact Lens Materials Using Silicone)

  • 김태훈;예기훈;권영석;성아영
    • 한국안광학회지
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    • 제11권2호
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    • pp.143-149
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    • 2006
  • 본 연구의 목적은 콘택트렌즈의 재료로 사용되는 실리콘 고분자를 합성하여 실리콘 재질의 가스 투과성 콘택트렌즈의 함수율과 광 투과성의 문제를 해결하는 데에 있다. 실험에 사용된 monomer들로는 NVP(N-vinly-pyrrolidone), MMA(methyl methacrylate), HEMA(Hydroxyethylmethacrylate)등과 교차결합제로 EGDMA(Ethylene Glycol Dimethacrylate)를 사용하였으며, 또한 콘택트렌즈 제조의 가장 좋은 조건을 위한 많은 조합 공식을 토대로 중합한 후, 중합된 개체를 가지고 함수율 측정과 광투과율 측정을 실시하였다. 본 실험의 연구 결과 재질의 투명성과 함수율을 동시에 추구하는 고분자를 합성하였고 그들의 물성을 측정하였다.

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THE CONTACT LENS RELATED CASE REPORTS IN PEDIATRIC POPULATION II

  • Chen, Ai-Hong;Kim, Douk-Hoon;Sung, A-Young
    • 한국안광학회지
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    • 제10권3호
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    • pp.237-240
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    • 2005
  • The cause of poor visual acuity was connected to the damage by the ocular trauma related. Especially the most cause of visual disorder was identified as irregular pupil by ocular damage. Therefore most patients stopped the wearing of the contact lens immediately by the visual decrease effects from irregular pupil disorder. But we had suggested that the contact lens wear was a very intensive visual therapy. We had identified the visual recover from several tests using the contact lens treatment.

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콘택트렌즈 분야의 표준화 규격 현황에 관한 연구 (Study on the Current Standardization Status in Contact Lens Field)

  • 김태훈;성아영
    • 한국안광학회지
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    • 제11권4호
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    • pp.351-355
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    • 2006
  • 본 연구는 국내 콘택트렌즈의 규격화 현황에 관하여 연구하였다. 최근 콘택트렌즈의 착용률이 증가하고 있음에도 불구하고 한국 산업 규격은 단지 국제 표준화 기구인 ISO(International Organization for Standardization)의 규정을 그대로 번역하여 사용하고 있으며, 아직 국내의 독자적인 규정이 없는 상태이다. 따라서 본 연구는 콘택트렌즈의 ISO(국제표준화 규격)를 조사, 연구하여 국제 규격이 우리의 현 실태와의 어느 정도 부합되는지와 이에 따른 문제점을 파악하여 개선되어야 할 부분에 대해 연구하였다.

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Fabrication and Processing Method of Ophthalmic Hydrogel Tinted Lens Containing Indium Tin Oxide-Composited Materials

  • Lee, Min-Jae;Lee, Kyung-Mun;Sung, A-Young
    • 한국재료학회지
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    • 제28권12호
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    • pp.685-690
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    • 2018
  • In this study, a multifunctional ophthalmic lens material with an electromagnetic shielding effect, high oxygen permeability, and high water content is tested, and its applicability is evaluated. Metal oxide nanoparticles are applied to the ophthalmic lens material for vision correction to shield harmful electromagnetic waves; the pyridine group is used to improve the antibacterial effect; and silicone substituted with urethane and acrylate is employed to increase the oxygen permeability and water content. In addition, multifunctional tinted ophthalmic lens materials are studied using lens materials with an excellent antibacterial effect (2,6-difluoropyridine, 2-fluoro-4-pyridinecarboxylic acid) and functional (UV protection, high wettability) lens materials (2,4-dihydroxy benzophenone, 2-hydroxy-4-(methacryloyloxy)benzophenone). To solve problems such as air bubbles generated during the polymerization process for the manufacturing and turbidity of the lens surface, polymerization conditions in which the defect rate is minimized are determined. The results show that the polymerization temperature and time are most appropriate when they are $110^{\circ}C$ and 40 minutes, respectively. The optimum injection amount of the polymerization solution is 350 ms. The turbid phenomenon that appears in lens processing is improved by 10 to 95 % according to the test time and conditions.

Synthesis of Novel Polythiol for Plastic Optical Lens and its Ophthalmic Lens

  • Jang, Dong-Gyu;Roh, Soo-Gyun;Kim, Jong-Hyo;Jin, Wen-Yi;Seo, Jin-Moo;Kwon, Myeong-Ja;Lee, Soo-Min
    • Bulletin of the Korean Chemical Society
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    • 제30권10호
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    • pp.2227-2232
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    • 2009
  • Novel polythiol materials of urethane lens series for plastic optical lens were synthesized from polyol materials via thioisouronium of thiourea with c-HCl in refluxing aqueous solution, in which polythiol material was carried out from hydrolysis of thioisouronium by ammonia water. Their structure properties were identified by EA, EI-MS, FT-IR, $^1H\;and\;^{13}C$ NMR spectroscopies and TGA. Their ophthalmic lenses as polythiourethane material were prepared by thermal curing to an injected glass mold using the evenly solutions of diisocyanates series (TDI, XDI, HDI or IPDI) with polythiols. Polythiourethane shows that the strong stretching mode for SH group of polythiol disappeared in FT-IR spectra after thermosetting polymerization. Thermal deformation starting temperature of ophthalmic lenses was determined by TMA. Ophthalmic lenses made from characteristic polythiol and diisocyanate series have transparency, colorless and good impact strength, in which thermal resistance and impact strength of ophthalmic lenses were influenced by diisocyanate series. Physical properties of ophthalmic lens have contrast thermal resistance with impact strength. The property of thermal resistance and impact strength for respective ophthalmic lenses was examined by TMA and drop ball test.

Polymerization and Preparation of Functional Ophthalmic Material Containing Carbon Nanoparticles

  • Lee, Min-Jae;Sung, A-Young
    • 한국재료학회지
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    • 제28권8호
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    • pp.452-458
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    • 2018
  • This research is conducted to create a functional hydrogel ophthalmic lens containing nanoparticles. Carbon nanoparticles and PEGMEMA are used as additives for the basic combination of HEMA, MA, and MMA, and the materials are copolymerized with EGDMA as the cross-linking agent and AIBN as the thermal initiator. The hydrogel lens is produced using a cast-mold method, and the materials are thermally polymerized at $100^{\circ}C$ for an hour. The polymerized lens sample is hydrated in a 0.9 % saline solution for 24 hours before the optical and physical characteristics of the lens are measured. The refractive index, water content, contact angle, light transmittance, and tensile strength are measured to evaluate the physical and optical characteristics of the hydrogel lens. The refractive index, water content, contact angle, UV-B light transmittance, UV-A light transmittance, visible light transmittance, tensile strength and breaking strength of the hydrogel lens polymer are 1.4019~1.4281, 43.05~51.18 %, $31.95{\sim}68.61^{\circ}$, 21.69~58.11 %, 35.59~84.26 %, 45.85~88.06 %, 0.1075~0.1649 kgf and 0.1520~0.2250 kgf, respectively. The results demonstrate an increase in refractive index, tensile strength and breaking strength and a decrease in contact angle and light transmittance. Furthermore, the visible light transmissibility is significantly increased at PEG 10 %. It is clear that this material can be used for high-performance ophthalmic lenses with wettability, ultraviolet ray blocking effect, and tensile strength.

안경렌즈 코아 가공을 위한 비구면 형상 도출 프로그램 개발 (Program Development for Extracting the Numerical Data of Aspherical Surface for the Core Manufacturing of Ophthalmic Lens)

  • 이동희
    • 한국안광학회지
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    • 제12권4호
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    • pp.87-90
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    • 2007
  • polycarbonate(PC)용 안경렌즈를 생산하는데 사용되는 몰드(mold)를 가공하기 위해서는 코아(core)의 가공이 필요하다. 코아의 가공은 Diamond Turning Machine(DTM) 또는 Computer Numerical Control(CNC) 선반으로 이루어지는데 이러한 장비의 운용을 위해서는 렌즈 코아 형상에 대한 수치 데이터가 필요하게 된다. 이에 우리는 렌즈 코아 형상에 대한 수치 데이터를 산출하는 프로그램을 개발하였다. 프로그램은 일반 비구면 식의 계수를 사용하여 수치 데이터를 산출할 수 있도록 개발하였으며, 형상 그래프를 보여줄 수 있도록 하였고, 필요한 수치 데이터 파일을 저장할 수 있도록 하였다.

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한국 대학생들의 소프트 콘택트렌즈 착용에 대한 실태 (The Status of Soft Contact Lens Wear in College Students in Korea)

  • 김덕훈;김정숙;문정학
    • 한국안광학회지
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    • 제9권2호
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    • pp.233-239
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    • 2004
  • 대학생들의 소프트 콘택트렌즈 착용에 대한 실태 연구에 대한 결과는 다음과 같다. 1. 대게 콘택트렌즈 착용자들의 최초 연령은 19세 또는 20세이다. 그러나 여성에서 콘택트렌즈 착용의 최초 연령의 분포는 10대 초기에서 20대 초기까지 넓은 분포를 가진다. 2. 대게의 피검자에서 콘택트렌즈 착용자에 대한 시력 검사의 임상 테스트와 콘택트렌즈의 구입 장소는 안경원이다. 3. 콘택트렌즈 착용의 장점에 대해서 대게의 남성 피검자들은 스포츠를 위해서 사용되나, 대부분의 여성 피검자들은 미용을 위해서 사용한다. 4. 대게 피검자들은 콘택트렌즈 착용 후 부작용 경험은 충혈, 이물감, 그리고 안통 등 이다. 5. 대부분의 피검자들은 콘택트렌즈 착용에 의한 안질환의 경험은 결막염이다. 단지 일부 피검자들은 각막염을 경험 한다. 6. 소프트 콘택트렌즈 착용에 의한 부작용 후 콘택트렌즈 처리에서, 대부분의 피검자들은 이전 콘택트렌즈의 재사용을 하였으나, 일부 피검자들은 새로운 렌즈의 교체를 원하였고, 역시 일부 피검자들은 콘택트렌즈의 착용을 거절하였다.

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High Performance Materials for Ophthalmic Hydrogel Lens Containing Nanoparticles

  • Kim, Duck-Hyun;Sung, A-Young
    • 통합자연과학논문집
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    • 제9권1호
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    • pp.16-22
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    • 2016
  • The optical and physical and characteristics of hydrogel ophthalmic lens polymerized with addition of 2,6-difluoropyridine, SiPc(silicon 2,9,16,23-tetra-tert-butyl-29H31H-phthalocyanine dihydroxide) and nanodiamond in the basic hydrogel material were evaluated. In particular, the utility of 2,6-difluoropyridine, SiPc and nanodiamond as a hydrogel ophthalmic lens material was investigated. 2,6-difluoropyridine, SiPc and nanodiamond were used as additives. And also, 2-hydroxyethyl methacrylate, acrylic acid, methyl methacrylate and a cross-linker EGDMA were copolymerized in the presence of AIBN as an initiator. The refractive index of 1.4348~1.4361, water content of 33.30~34.02%, UV-B transmittance of 4.77~67.50%, UV-A transmittance of 1.45~89.19% and visible transmittance of 32.12~92.21% were obtained. The results of hydrogel lens containing 2,6-difluoropyridine (add 5%) showed antibiosis for staphylococcus aureus. The produced copolymer is suitable for hydrogel soft ophthalmic lenses with antibiotic and anti-UV effect.