부산대학교 도서관

Purpose To compare the effect of a single drop of different lubricant eye gels on tear film thickness ( TFT) as measured with ultrahigh-resolution optical coherence tomography ( UHR- OCT) in patients with mild-to-moderate dry eye disease ( DED). Methods The study followed a randomized, single-masked, observer-blinded parallel group design. Patients received a single dose of either unpreserved trehalose 3% + hyaluronic acid 0.15% ( TH), hyaluronic acid 0.2% ( HA) or polyethylene glycol 0.4% + propylene glycol 0.3% ( PP) eye drops. In total, 60 patients were included and TFT was measured using a custom-built UHR- OCT system. Results The mean TFT at baseline was 3.5 ± 0.7 μm. There was a significant difference in the time-course of TFT between the three groups (p = 0.001 between groups). Ten minutes after instillation, TFT increased by 155.8 ± 86.6%, 65.7 ± 71.5% and 33.4 ± 19.6% in the PP, TH and HA group, respectively (p < 0.001 between groups). Thirty minutes after instillation, the effect of all three different agents on TFT was comparable. Sixty and 120 min after administration, a significant increase in TFT was only seen for the TH group, but not for the other products (60 min: p < 0.021 between groups; 120 min: p < 0.037 between groups). Conclusion In conclusion, we observed differences in TFT after administration of the lubricant gels. Ten minutes after instillation, a pronounced increase in TFT was observed in all groups. As compared to the other products, the combination of trehalose 3% + hyaluronic acid 0.15% offers a significantly longer increase in TFT indicating for a longer residence time. [ABSTRACT FROM AUTHOR]