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Proposed structure of the tear film (on the left) and the amphiphilic lipid sublayer formed of very long chain (O-acyl)-ω-hydroxy fatty acids and diacyl glycerols (on the right).
*Di- and tri-esters as defined by Nicolaides et al (Nicolaides and Santos, 1985). The locations of double bonds in the structures of the very long chain ω hydroxy fatty acids are tentative (Butovich et al., 2009b).
