“…To overcome the disadvantages of traditional eye drops, several ocular drug delivery systems have been developed in recent years, such as in-situ gels [4], microemulsions [5], microspheres [6], liposomes [7], solid lipid nanoparticles (SLN) [8], and nanostructured lipid carriers (NLC) [9]. Among them, liposomes have a great potential for penetration enhancement and high biocompatibility [10,11] .…”