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KMID : 1011420100150010055
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Journal of Korean Ophthalmic Optics Society
2010 Volume.15 No. 1 p.55 ~ p.60
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Changes of the Plastic Lens Properties Caused by Etching of the Coating Films
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Moon Byeong-Yeon
Lee Yoon-Jeong
Hwang Ki-Ju
Yu Dong-Sik
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Abstract
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Purpose: We investigated the changes of plastic lens after etching of coating films by comparing uncoated lens.
Methods: CR-39, middle index and high index lenses of 0 (zero) diopter were etched at 80oC and room temperature using a coating remover, and then changes of refractive power, transmittance and surface morphology were investigated.
Results: There were no differences in refractive power and transmittance between uncoated and etched lenses. The etching rate was similar in both CR-39 and middle index lens, but in the case of high index lens, it was slower and less steady than the others. From the SEM observation of lens surface, etching damage was found out on the surface of etched lens. It was shown the least damage in middle index lens but the most damage in high index lens.
Conclusions: If the etching of coating films is demanded on condition that the surface of ophthalmic lenses are not damaged, a using of most adequate coating remover based on lens material should be considered, and a caution for proper etching conditions is required.
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KEYWORD
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Coating, Coating remover, Etching, Plastic Lens, Scanning electron microscope
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