4.6 Article

In vivo confocal microscopy classification in the diagnosis of meibomian gland dysfunction

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EYE
卷 33, 期 5, 页码 754-760

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NATURE PUBLISHING GROUP
DOI: 10.1038/s41433-018-0307-9

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Aim Meibomian gland dysfunction (MGD) is one of the most common disorders in ophthalmology. The aim of this study was to evaluate the use of this in vivo confocal microscopy (IVCM)-MGD description to classify patients affected by clinical MGD and measure the correlation with standard clinical criteria and subjective symptoms. Methods One hundred eyes of 100 patients suffering from MGD and 15 eyes of normal subjects were included. A comprehensive evaluation with the ocular surface disease index (OSDI), Schirmer test, tear break-up time (TBUT), tear osmolarity, Oxford score, Meibomian gland expression, palpebral IVCM, and meibography was performed. Then each patient was classified using a new IVCM classification: type 0 for normality, type 1 for meibum obstruction, type 2 for inflammation, and type 3 for fibrosis. Results The mean age of patients was 52 +/- 20 years old, the OSDI was 38 +/- 23, the BUT 5 +/- 2.6 s, the Schirmer test 13 +/- 7 mm, tear osmolarity 300 +/- 11 osmol/L, the Oxford score 0.5 +/- 0.6, the meibum expression score 1.7 +/- 1.02, and the meibography score 1.3 +/- 0.9. The IVCM MG classification of the 15 normal subjects was 0. For MGD patients, 29% were in type 1, 40% were type 2, and 31% were type 3. The patients in IVCM MG type 2 had a higher OSDI (p = 0.001) compared with the other types. There was a strong correlation between the IVCM score and the meibography score (r = 0.71 p <0.0001). Conclusion This new IVCM classification provided a practical pathophysiological system for MGD. By giving objective criteria, this IVCM classification may help advance the understanding of patients' symptoms and enhance treatment effectiveness in MGD.

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