Findik H, et al. - Authors probed the impact of posterior ocular hemodynamics on the retinal nerve fiber layer (RNFL), choroid thickness (CT) and central macular thickness (CMT) in patients with obstructive sleep apnea syndrome (OSAS) and they revealed the relationship with glaucomatous optic neuropathy. A linear increase was demonstrated by the pulsatile index (PI) and resistive index (RI) values of the posterior ciliary artery (PCA), which supplied the optic nerve, as the apnea hypoxia index values in OSAS. This situation led to a more serious ischemic optic neuropathy as the grade of OSAS improved. Also, the prevalence of glaucoma was found to be higher in the severe OSAS group.