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Measurement of peripheral thickness of soft contact lenses using a phase-contrast microscope Kiyoshi Akeo 1,2 , Yoko Akeo 1,2 , Keiichirou Akeo 2 , Mika Oomori 2 , Keiko Tobita 2 , Teiko Katou 2 1Akeo Eye Clinic 2Akeo Eye Institute pp.372-378
Published Date 2024/3/15
DOI https://doi.org/10.11477/mf.1410215127

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Abstract Purpose:We have checked the central thickness on the pamphlet about soft contact lenses. In this study we measured the peripheral thickness using a phase contrast microscope and a 20- megapixel camera because the phase shifts were transformed into changes in amplitude, which can be observed as differences in image contrast.

Materials and Methods:We set up the upper side of SCL at the side of the objective lens to observe the edge of the peripheral SCL〔−3, −7.5, −12 diopter(D)〕of the wearable lenses for 1 day and 2 weeks〔AQUALOX®(AQ):Bausch & Lomb, ACUVUE OASYS®(OA):Johnson & Johnson〕as the specimens. SigmaScan® was used for image analysis, and SigmaStat® for statistical analysis as software. Linear regression analysis is commonly used to forecast values for a given variable(dependent variables)based on the values of other variables(independent variables). The relative contributions of diopter(Diopter)and wearable time(Time), i.e., independent variables, to the repression of thickness, i.e., the dependent variables for multiple linear regression. We added that(IAQ)is an indicator for AQ both set equal to 1 in the case of AQ and to 0 for OA as the included terms for specific differences in thickness. The indicator of AQ was used with another variable, e.g.(IAQ)(Diopter)and(IAQ)(Time)to identify of significant AQ as specific differences in response to a specific factor, in this case, the response of Thickness influenced by AQ, Diopter, and Time.

Results:The significant positive coefficient value(Diopter)about OA was shown, and it meant that the peripheral thickness of OA was thinner according to diopter because diopter in myopia was negative. The significant negative coefficient value(IAQ), an indicator for AQ, showed that the peripheral thickness of AQ, which had nothing to do with diopter and wearable time was thinner than that of OA.

Conclusions:Soft contact lenses have different peripheral thickness;thus among the types of SCL, and we suggested that it was necessary to consider the comfortable quality of fitting and fragility must be considered.


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電子版ISSN 1882-1308 印刷版ISSN 0370-5579 医学書院

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