Phase I Study to Assess the Safety and Efficacy of OCU200 for Center-Involved Diabetic Macular Edema (DME)

Inclusion Criteria: 1. Diagnosis of Type 1 or Type 2 Diabetes Mellitus 2. Decreased visual acuity attributable primarily to DME 3. Central-involved DME with central retinal subfield thickness (CST) values, as assessed with spectral-domain optical coherence tomography (SD-OCT) of: 1. ≥ 320 but ≤ 450µm if male or ≥ 305 but ≤ 435µm if female on Heidelberg Spectralis 2. ≥ 305 but ≤ 435µm if male or ≥ 290 but ≤ 420µm if female on Zeiss Cirrus 4. BCVA ≤ 78 and ≥ 24 letters on ETDRS chart 5. Sufficient ocular media clarity, pupillary dilation and participant cooperation to permit acquisition of good quality retinal imaging 6. No history of prior anti-VEGF injection or history of at least 2 consecutive intravitreal anti-VEGF injection (less than 7 weeks apart) with incomplete resolution of CST within 1 year. Note: The last anti-VEGF injection must be administered at least six weeks (45 days) prior to the study treatment (Day 1) in the study eye. Exclusion Criteria: 1. Presence of any condition that prevent clear visualization of retina (e.g., significant cataract, vitreous hemorrhage) 2. Uncontrolled hypertension 3. Uncontrolled glaucoma 4. Concurrent disease in the study eye, other than central-involved DME 5. Intravitreal or periocular steroid treatment within 3 months prior to the screening visit 6. Any ocular surgery within 3 months prior to the screening visit in the study eye 7. Uncontrolled/poorly controlled diabetes (Glycated hemoglobin (HbA1c) ≥ 10%) 8. History of retinal detachment in the study eye or other retinal vascular disease in the study eye 9. Focal or pan-retinal laser photocoagulation in the study eye within 3 months prior to the screening visit 10. Presence of any inherited retinal disease or history of proliferative diabetic retinopathy 11. History of Renal disease including stage 3b or worse