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Increased Tear Film Osmolarity in Systemic Lupus Erythematosus
Necati Duru1, Hasan Altinkaynak1, Betul Seher Uysal1
1a Department of Ophthalmology , Ankara Ataturk Education and Research Hospital , Ankara , Turkey.
Purpose:
To evaluate tear film osmolarity in patients with systemic lupus erythematosus (SLE).
Methods:
A total of 55 eyes from 55 patients with SLE and 47 eyes from 47 age- and gender-matched healthy individuals were included in this study. Tear film osmolarity was evaluated with a lab-on-a-chip technique (TearLab; TearLab Corporation, San Diego, CA) in SLE patients in comparison with healthy individuals, and results were correlated to clinically available diagnostic tests for dry eye, such as tear film break-up time (BUT), Schirmer's test, and Ocular Surface Disease Index (OSDI).
Results:
The mean tear film osmolarity in the SLE patients and healthy individuals was 306.02 ± 13.27 mOsm/L and 300.74 ± 9.11 mOsm/L, respectively, which made for a statistically significant difference (p = 0.020). In the SLE group, tear film osmolarity was negatively correlated with the Schirmer's test score and the BUT value (r = -0.295 p = 0.029 and r = 0.347 p = 0.009, respectively), whereas tear film osmolarity was not correlated with OSDI score (r = -0.182 p = 0.183).
Conclusions:
This study revealed that tear film hyperosmolarity and abnormal tear film function are associated with SLE.
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