MS-553 in Diabetic Retinopathy Patients With Central Involved Macular Edema

This study is testing a new eye drop medication called MS-553 in people with diabetic retinopathy who also have macular edema (swelling in the central part of the retina that affects vision) — a complication of diabetes that can lead to vision loss. **You may be eligible if...** - You have a confirmed diagnosis of diabetes (type 1 or type 2) - You have diabetic retinopathy with central macular edema in at least one eye - You are able to follow study instructions and attend all required visits - You are willing to use effective birth control during the study **You may NOT be eligible if...** - You have recently had eye surgery or laser treatment in the affected eye - You are pregnant or breastfeeding - You have another serious eye condition in the affected eye (such as glaucoma or severe cataracts) - You are taking medications that may interact with the study drug Talk to your doctor to see if this trial is right for you.