**1. Introduction**

Spectral domain optical coherence tomography (SD-OCT) is a common useful noninvasive imaging instrument which is used for the diagnosis and follow-up of macular diseases, such as age-related macular degeneration (AMD), diabetic macular edema (DME), epiretinal membrane (ERM), or macular hole. The clinical findings by OCT in these pathologies are well known. SD-OCT allows detail assessment of the retinal thickness and morphologic evaluation of the retinal layers. Currently, due to the development of this technology and its extensive use, new OCT findings have been reported in the literature. The higher resolution and speed of SD-OCT have improved the accuracy and reproducibility of macular imaging and have allowed an enhanced assessment of the integrity of the outer retinal bands.
