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  • Title: Infrared imaging of meibomian glands and evaluation of the lipid layer in Sjögren's syndrome patients and nondry eye controls.
    Author: Menzies KL, Srinivasan S, Prokopich CL, Jones L.
    Journal: Invest Ophthalmol Vis Sci; 2015 Jan 08; 56(2):836-41. PubMed ID: 25574045.
    Abstract:
    PURPOSE: The purpose of this study was to evaluate meibomian gland dropout and lipid layer thickness (LLT) in patients with and without Sjögren's syndrome dry eye (SS). METHODS: We recruited 11 participants with SS (males/females [M/F], 1:10; mean age = 56.0 ± 9.1 years) and 10 control subjects without dry eye (M/F, 3:7; mean age = 58.5 ± 4.7 years). All participants completed the Ocular Surface Disease Index (OSDI) questionnaire. The LLT was assessed using the Tearscope Plus based on the appearance of the lipid layer. Noninvasive tear break-up time (NITBUT) also was measured. The lower and upper lids were everted, and the meibomian glands were imaged using the infrared camera of the Keratograph 4. A meibomian gland dropout score due to gland loss was obtained. Statistical analysis was conducted using the Mann-Whitney U test and correlations were determined using Spearman rank correlations. RESULTS: Of the SS participants, 100% reported ocular and oral dryness symptoms in the AECC questionnaire. The SS group recorded a higher OSDI score (median = 48.00, interquartile range [IQR] 23.0-56.2 vs. 2.1, IQR 0.0-2.6; P < 0.001), reduced LLT (median [IQR] = 15.0 [15.0-15.0] vs. 60.0 [45.0-100.0] nm; P = 0.001), and lower NITBUT (median [IQR] = 3.7 [2.5-4.2] vs. 9.5 [6.4-17.6] sec; P < 0.001) compared to the controls. Digital meibomian gland dropout score (% dropout) was significantly higher for the SS group (16.0% [IQR 12.1-40.0%] vs. 6.7% [IQR 1.5-12.7%]; P = 0.01). Subjective meibomian gland dropout score (0-6 score) was significantly higher for the SS group (median [IQR] = 1.5 [1.0-4.0] vs. 1.0 [0.0-1.25]; P = 0.03). CONCLUSIONS: Patients with SS showed higher meibomian gland dropout scores and reduced LLT and NITBUT, which likely contribute to the severe dry eye symptoms reported by SS subjects.
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