| The Relationship Between Asphericity and Visual Acuity After Wearing Reverse-Geometry Lens. |
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Jung Hwa Na, Jeong Hoon Choi, Ji Wook Yang, Young Chun Lee, Su Young Kim |
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Department of Ophthalmology and Visual Science, College of Medicine, The Catholic University of Korea, Seoul, Korea. cassiopeia@catholic.ac.kr |
| 역기하렌즈 착용 후 시력과 비구면계수의 관계 |
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나정화ㆍ최정훈ㆍ양지욱ㆍ이영춘ㆍ김수영 |
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Department of Ophthalmology and Visual Science, College of Medicine, The Catholic University of Korea, Seoul, Korea |
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| Abstract |
PURPOSE
To report the change of corneal asphericity and the relationship between asphericity and visual acuity after wearing the reverse-geometry lens. METHODS: The authors reviewed out-patient records of 37 consecutive patients wearing reverse-geometry lenses. The patients were followed up from July 2004 to December 2007. The unaided visual acuity (VA), spherical equivalent (SE) and asphericity before and after wearing the lens were compared. The relationship of SE and final VA, initial astigmatism and final VA, and asphericity and final VA was also analyzed. In addition, the relationship between the increment of VA and asphericity was determined. RESULTS: VA and SE improved and the asphericity decreased after wearing the lens (p<0.05). There was high correlation between the spherical equivalent and final visual acuity (p<0.001), and no correlation between asphericity and final visual acuity (p=0.358) was observed. However, the lower the initial asphericity, the greater the increment of visual acuity observed (p=0.048). CONCLUSIONS: Initial corneal asphericity can be a predictor of increment of VA after wearing reverse-geometry lenses. |
| Key Words:
Corneal asphericity;Corneal eccentricity;Orthokeratology;Reverse-geometric lens;Spherical equivalent |
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