Pilot and Phase 2 Study of the Efficacy of a Treatment Protocol With Dexamethasone Implant Loading Dose in Patients With Diabetic Macular Edema (LOADEX)

"* Loading dose with 2 systematic intravitreal injections (IVI) of ozurdex at the baseline and 12 weeks.Followed by a PRN regimen with strict retreatment criteria (already used and published in the Prediamex study, Bellocq,Kodjikian et al Ophthalmology Retina 2017)~* Retreatment criteria: Reduction in VA ≥ 5 ETDRS Letters; and/or CSMT ≥ 275 microns by OCT-Cirrus® or ≥ 285 microns by OCT Spectralis®/Topcon; and/or increase of CSMT \> 50 microns; and/or onset of recurrent retinal cysts; and/or residual edema considered by the practitioner to be clinically significant.~* Minimal time limit between two IVI : 12 weeks~* Visits: monthly during 1 year (to check efficacy and safety) and then for the 2nd-year only at Month18 (M18) and Month 24 (M24)"