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The Difference of Tear Break-Up Time by the Fitting States of Soft Contact Lens in Normal and Dry Eyes  

Jung, Da I (Department of Visual Optics, Seoul National University of Science and Technology)
Lee, Heum Sook (Department of Food Science and Technology, Seoul National University of Science and Technology)
Kim, So Ra (Department of Visual Optics, Seoul National University of Science and Technology)
Park, Mijung (Department of Visual Optics, Seoul National University of Science and Technology)
Publication Information
Journal of Korean Ophthalmic Optics Society / v.15, no.4, 2010 , pp. 339-346 More about this Journal
Abstract
Purpose: The study was performed to compare the difference of non-invasive tear break-up time (NIBUT) with alignment or steep fitting of soft contact lens in normal and dry eyes. Methods: Total 40 eyes (aged 20~30 years) were classified to the normal (n=20) or dry eye group (n=20) by the diagnosis methods for dry eyes and worn soft contact lens (polymacon material) with alignment or steep fitting. NIBUTs of lens wearers were separately measured at the points of before wearing, immediately after wearing and after stabilization of tear film. Results: With alignment fitting, averaged NIBUT in the dry eye group after stabilization of tear film was not significantly different from that of the normal eye group. However, averaged NIBUTs in the normal and dry eyes had significant difference when measured immediately after lens wearing. However, the number of eyes having NIBUT less than 4.0 second was 30% higher compared to the number of normal eyes with steep fitting when measured immediately after wearing. Some shorten NIBUT in dry eyes with steep fitting was also shown after stabilization of tear film. Conclusions: These results suggest that wearing soft contact lens in dry eyes differently affect tear film compared to normal eyes. Thus, dry eyes need more advertent fitting for contact lens wearing because of unstable tear film.
Keywords
Soft lens; Polymacon material; Dry eye; Fitting states; Non-invasive tear break-up time;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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