Background: Even in advanced nations, diabetic retinopathy (DR) and Diabetic Macular Edema (DME) are regarded the major reasons for blindness, reducing the quality of life in patients. OCT is a scan method for the whole macular region, which not only measures macular thickness, but also reveals retinal structural alterations. For precise determination of macular thickness, OCT is regarded the most sensitive parameter. The goal of this research was to detect, analyse and link the presently known tomographical patterns of diabetic macular edoema with other parameters such as: BCVA, diabetes duration and HbA 1c. Methods: 117 eyes out of 66 patients underwent a study; all patinte were exposed to a visual acuity, a previous sector exam and complete fundus examination. OCT was done to all patients involved. There was no statistically significant relationship with BCVA in the laboratory data. Results and conclusion: In our research, the BCVA&CMT association is statistically significant. In addition, we discovered central macular edoema (>300 μm) as the most significant OCT patterns influencing vision. No significant differences between CMT and HbAlc & RBS were statistically identified.