Journal of Korean Clinical Health Science (한국임상보건과학회지)

The Korean Society of Clinical Health Science (한국임상보건과학회)
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The Correlation Between Corneal Eccentricity and Radius Curvature by Fitting Status of Soft Contact Lens Wearer

소프트 콘택트렌즈 착용자의 피팅 상태에 따른 각막 이심률과 곡률반경과의 상관관계

  • Han, Sun-Hee (Department of Optometry, Choonhae College of Health Science) ;
  • Kim, Bong-hwan (Department of Optometry, Choonhae College of Health Science) ;
  • Park, Jun-Sung (Department of Optometry, Choonhae College of Health Science) ;
  • Baek, Su-won (Department of Optometry, Choonhae College of Health Science) ;
  • Kwon, Sung Jin (Department of Optometry, Choonhae College of Health Science) ;
  • Kim, Eun Kyoung (Department of Optometry, Choonhae College of Health Science) ;
  • Yoon, Jung Na (Department of Optometry, Choonhae College of Health Science) ;
  • Choi, So Min (Department of Optometry, Choonhae College of Health Science) ;
  • Heo, A Jeong (Department of Optometry, Choonhae College of Health Science) ;
  • Park, Eun Hye (Department of Optometry, Choonhae College of Health Science)
  • 한선희 (춘해보건대학교 안경광학과) ;
  • 김봉환 (춘해보건대학교 안경광학과) ;
  • 박준성 (춘해보건대학교 안경광학과) ;
  • 백수원 (춘해보건대학교 안경광학과) ;
  • 권성진 (춘해보건대학교 안경광학과) ;
  • 김은경 (춘해보건대학교 안경광학과) ;
  • 윤정나 (춘해보건대학교 안경광학과) ;
  • 최소민 (춘해보건대학교 안경광학과) ;
  • 허아정 (춘해보건대학교 안경광학과) ;
  • 박은혜 (춘해보건대학교 안경광학과)
  • Received : 2016.08.17
  • Accepted : 2016.08.30
  • Published : 2016.12.31
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Abstract

Purpose. Because of a recent increase in use of soft contact lens at younger ages, in the present study, the correlation between corneal eccentricity and radius of curvature and fitting types of contact lens was investigated. Methods. The study evaluated the fitting status of targets through lens centration, push-up test, dynamic lag test and static lag test of lenses usually worn by 49 men and women (98eyes) in their 20s to 30s who put on soft contact lenses. After evaluation, the subjects were classified into 3 categories by fitting status(steep, aligment and flat). The radius of corneal curvature in the naked eyes was measured by using keratometer. Moreover the corneal eccentricity in the nasal side, temporal side, superior side and inferior side was measured by using the device capable of measuring the corneal eccentricity. Results. The radius of corneal curvature and corneal eccentricity of soft lenses worn by subjects were higher in the order of steep fitting and flat fitting, and the higher average corneal curvature radius and corneal eccentricity is intend to be more steep fitting(p=0.051, p=0.052). The corneal eccentricity showed a tendency to nasal fitting type at the higher eccentricity and temporal fitting type at the smaller eccentricity, statistically significant difference was observed(p<0.05). The study showed there were low correlation that nasal and temporal side at steep fitting, superior side at normal fitting and 4side(nasal, temporal, superior, inferior) at flat fitting, therefore when the corneal eccentricity changed the radius of corneal curvature also changed. The corneal eccentricity and the radius of corneal curvature showed statistically significant difference at 4side and each fitting types(p<0.05). Conclusions. The results of this study, the fitting status, of wearer are based on radius of corneal curvature and corneal eccentricity, and if lens fitting would be done considering that, it seems to be useful in a soft contact lens prescription.

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References

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