Journal of Korean Ophthalmic Optics Society (한국안광학회지)

The Korean Ophthalmic Optics Society (한국안광학회)
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Comparative Analysis of Refractive Power on Trial Case Lenses

검안렌즈의 굴절력 비교 분석

  • 문병연 (강원대학교 안경광학과)
  • Received : 2012.08.13
  • Accepted : 2012.12.15
  • Published : 2012.12.31
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Abstract

Purpose: In this study, the distribution and differences in refractive powers on trial case lenses were investigated. Methods: We measured refractive powers at optical center and periphery using 4 trial case lens sets. According to international standards, the distribution and uniformity in refractive powers were investigated. Results: The lens shapes were different in different kinds of trial case lenses and some of lenses were out of tolerance according international standards. In some cases, the power differences were found between front and back side as well as between optical center and peripheral regions and also the cylindrical power on spherical lens and spherical power on the cylindrical lens were measured. Conclusions: Trial case lens are used to assess the refractive error, therefore, more precise control of the manufacturing process for trial case lenses and more thorough quality control will be required to offer an accurate vision test. More careful attention in using trial case lens is also required.

목적: 검안렌즈에서 굴절력의 분포와 차이를 알아보고자 하였다. 방법: 4개 제품의 검안렌즈에 대해 광학중심과 주변부에서 굴절력을 측정하여, 굴절력의 분포와 균일성을 조사하고 국제규격과 비교하였다. 결과: 검안렌즈의 제품에 따라서 렌즈의 형상에 차이가 있으며, 국제규격의 굴절력 허용오차를 초과하는 경우가 있었다. 일부 렌즈에서 전 후면의 굴절력에서 차이, 광학중심과 주변부에서 굴절력의 차이가 발생되었으며, 원주렌즈에서 구면굴절력, 구면렌즈에서 원주굴절력이 측정되는 경우도 있었다. 결론: 검안렌즈는 굴절이상을 평가하는데 사용된다. 따라서 정확한 시력검사를 위해 검안렌즈는 좀 더 정밀한 제조가 요구되며, 이를 위해 철저한 품질관리가 필요할 것이다. 또한 검안렌즈를 사용함에 있어서 좀 더 세심한 주의와 관심이 요구된다.

Keywords

References

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