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KMID : 1011420150200020105
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Journal of Korean Ophthalmic Optics Society
2015 Volume.20 No. 2 p.105 ~ p.115
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Analysis of Vertex Refractive Power Accuracy of Soft Contact Lens with Holder Type
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이민제:Lee Min-Jae
성아영:Sung A-Young
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Abstract
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Purpose: The accuracy for measuring the refractive power of hydrogel contact lenses by spectacle lens holder and contact lens holder was evaluated. The accuracy for each sample was also analyzed with water content and diopter categories.
Methods: The hydrogel contact lenses used for measurement were classified into three categories in water content (38%, 43%, 58%). Also, three diopter categories of refractive power were used such as ?3.000 D, ?7.000 D, ?10.000 D. And also, the reliability of measurement results were evaluated by measuring refractive power with spectacle lens holder and contact lens holder using an Manual lensmeter.
Results: In case of spectacle lens holder method, the average value of refractive power was ?3.3273D for ?3.0000 D, ?7.1306 D for ?7.0000 D and ?10.2944 D for ?10.0000 D, respectively. In case of contact lens holder method, the average value of refractive power was ?3.1060 D for ?3.0000 D, ?7.0028 D for ?7.0000 D and ?10.2611 D for ?10.0000 D, respectively. In measurement of all diopters, the accuracy of contact lens holder method was better than spectacle lens holder method.
Conclusions: From these results, it is judged that the refractive power of soft contact lens by anual lensmeter with contact lens holder have a higher accuracy than spectacle lens holder.
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KEYWORD
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Manual lensmeter, Spectacle lens holder, Contact lens holder
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