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. Author manuscript; available in PMC: 2020 Apr 1.
Published in final edited form as: Ocul Surf. 2018 Dec 12;17(2):318–326. doi: 10.1016/j.jtos.2018.12.006

Figure 3.

Figure 3.

LC-MS/MS analyses of human meibum conducted in triple quadrupole mode. Ceramide (Cer), hexosyl ceramide (Hex-Cer), and sphingomyelin (SM) were separated by reverse phase LC using a C18 column, as described in the methods section. The mole percent of Cer, Hex-Cer, and SM were compared across groups defined by clinical parameters. A and B. Comparison of mole percent of Cer, Hex-Cer, and SM with meibum quality. C and D. Comparison of mole percent of Cer, Hex-Cer, and SM with meibomian gland dropout. E and F. Comparison of mole percent of Cer, Hex-Cer, and SM with inferior meibomian gland plugging.