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KMID : 0360220150560071006
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Journal of the Korean Ophthalmological Society
2015 Volume.56 No. 7 p.1006 ~ p.1011
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Long-Term Effect and Safety of Contact Lenses for Keratoconus
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Lee Jong-Heon
Park Young-Min
Park Young-Kee
Lee Jong-Soo
Lee Ji-Eun
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Abstract
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Purpose: To evaluate the long-term clinical effect and safety of YK-KC lens (LucidKorea Ltd., Seoul, Korea) for keratoconus.
Methods: In this study we investigated 152 keratoconic eyes fitted with YK-KC lens and followed up for at least 5 years. We assessed retrospectively self-reported patient comfort, best corrected visual acuity, corneal topographic indices before and after contact lens fitting and complications during contact lens wearing.
Results: The study included 57 male and 40 female patients with a mean age of 28.6 ± 8.5 years. The mean follow-up was 8.0 ± 2.9 years. Regarding lens comfort, 126 eyes (82.9%) showed self-reported comfort for YK-KC lenses. The mean best corrected visual acuity (log MAR) improved from 0.49 ± 0.42 before lens fitting to 0.19 ± 0.27 after lens wearing, which was statistically significant (p < 0.001). Based on the keratometric values, after contact lens fitting both Simulated keratometry (Sim K) max and Sim K min tended to be steeper, but these differences were not statistically significant (p = 0.66 and 0.11, respectively). There were no statistically significant differences between the values before and after fitting with respect to the astigmatic powers(p = 0.22). Complications observed included punctate or coalesced epithelial corneal staining in 24 eyes (16%), however, persistent full-thickness epithelial defect was not observed.
Conclusions: The YK-KC lens in patients with keratoconus can provide excellent visual improvement and comfort without any significant influence on the progression of keratoconus or corneal complications during a long-term follow-up period.
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KEYWORD
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Contact lens, Keratoconus, YK-KC lens
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