TF and glaucoma: A stable preocular TF is a hallmark of ocular health.22 The TF has a vital role in providing lubrication and protection to the ocular surface, as well as maintaining a smooth, refractive surface for optimal visual performance.23 A stable state of equilibrium (ie, homeostasis) of the ocular surface with a stable TF and TF lipid layer (TFLL) is expected to create a healthy ocular surface environment that can contribute to the management of the underlying ocular surface inflammation existing in glaucoma patients with OSD and consequently to a better IOP control in these patients.24