Journal of Korean Ophthalmic Optics Society (한국안광학회지)

The Korean Ophthalmic Optics Society (한국안광학회)
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Influence of Artificial Tear Containing Carboxymethyl Cellulose Component on Physical Properties of Hydrogel Contact lens

카르복시메칠 셀룰로오스 성분이 포함된 인공누액이 하이드로젤 콘택트렌즈의 물성에 미치는 영향

  • 조선아 (세한대학교 안경광학과) ;
  • 성아영 (세한대학교 안경광학과)
  • Received : 2013.11.12
  • Accepted : 2013.12.14
  • Published : 2013.12.31
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Abstract

To determine the impact of artificial tears which include carboxymethyl cellulose on a hydrogel contact lenses. Methods: A contact lenses made of the cross-linking agent, EGDMA (ethylene glycol dimethacrylate) and HEMA (2-hydroxyethyl methacrylate) and with added NVP (n-vinyl-2-pyrrolidone) and MMA (methyl methacrylate) was evaluated for water content, refractive index, spectral transmittance and contact angle of produced contact lens. Results: The physical properties of the sampled copolymerized polymers showed that water content, refractive index, visible ray transmittance and contact angle were in the range of 26.61%~48.58%, 1.422~1.455, 80.8%~91.4% and $33.93^{\circ}{\sim}65.70^{\circ}$, respectively. In addition, after soaking with artificial tears, the water content, refractive index and contact angle were in the range of 24.46%~48.25%, 1.422~1.457, 77.0%~91.0% and $37.25^{\circ}{\sim}77.33^{\circ}$, respectively. The changes of the physical property depending on hydration time and showed an increase of refractive index and contact angle, decrease of water content and visible ray transmittance. Conclusions: Artificial tears which include carboxymethyl cellulose sodium which is used as a wetting agent influenced water content, refractive index, contact angle and spectral transmittance of a hydrogel contact lenses.

목적: 본 연구는 하이드로젤 콘택트렌즈에 미치는 카르복시메칠 셀룰로오스나트륨을 포함한 인공누액의 영향을 다양한 조건에서 분석 하였다. 방법: 렌즈 재료로 사용되는 NVP(N-vinyl-2-pyrrolidone) 및 MMA(methyl methacrylate)를 가교제인 Ethylene glycol dimethacrylate를 사용하여 HEMA(2-hydroxyethyl methacrylate)와 공중합 하였으며, 개시제로는 azobisiobutyonitrile을 사용하였다. 또한 제조된 렌즈의 물리적 특성을 평가하기 위해 함수율, 굴절률, 접촉각 그리고 분광투과율 등을 측정하였다. 결과: 제조된 콘택트렌즈의 기본 물성을 측정한 결과, 함수율 26.61% ~ 48.58%, 굴절률 1.422~1.455 그리고 분광투과율의 경우 80.8%~91.4%로 나타났으며 접촉각은 $33.93^{\circ}{\sim}65.70^{\circ}$의 범위로 나타났다. 또한 제조된 콘택트렌즈를 인공누액에 침지시킨 후 측정한 물리적 특성은 함수율 24.46%~48.25%, 굴절률 1.422~1.457 또한 분광투과율의 경우 77.0%~91.0%로 나타났으며 접촉각은 $37.25^{\circ}{\sim}77.33^{\circ}$의 범위로 나타났다. 수화시간에 따른 물성 변화는 굴절률의 증가, 함수율의 감소, 광투과율 감소 및 접촉각의 증가를 나타내었다. 결론: 카르복시메칠 셀룰로오스나트륨을 포함한 인공누액은 친수성 하이드로젤 콘택트렌즈의 함수율, 굴절률, 접촉각 그리고 광투과율에 영향을 주는 것으로 나타났다.

Keywords

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