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KMID : 1159320140160020217
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Korean Journal of Vision Science
2014 Volume.16 No. 2 p.217 ~ p.226
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The Study on the Change of Luminous Transmittance and Contrast Sensitivity by Soft Contact Lens Affected Ultraviolet Rays
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Jeong Hee-Young
Kim Ha-Rim
Jeong Ju-Hyun
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Abstract
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Purpose: In this study, the change of luminance transmittance and contrast sensitivity was studied by the change of UV cut-off soft contact lens according to increasing the exposure UV-A, UV-B, UV-C
Methods: Luminance transmittance of two hydrogel lenses, two silicone hydrogel lenses which affected UV-A, B, C lamp was measured and the contrast sensitivity was examined to the patient 23(46 eyes)
Results: The luminance transmittance of soft contact lens irradiated UV lamp greatly decreased from the lens irradiated by UV-C lamp to UV-B and UV-A. Contrast sensitivity test was performed to experimental subjects who wore soft contact lens affected by the same amount of ultraviolet irradiation.(9.35mJ/cm2) The measured value of lens irradiated by UV-C lamp was the lowest, which was a statistically significant difference(p<0.05).
Conclusions: The change of luminance transmittance and contrast sensitivity of soft contact lens irradiated by ultraviolet A, B, C was affected by UV-C, UV-B, UV-A in regular sequence and silicone hydrogel material type was more affected than hydrogel material type.
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KEYWORD
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UV, soft contact lens, luminance transmittance, contrast sensiti
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