Slow enrollment

To evaluate the safety and efficacy of ocular iontophoresis with dexamethasone phosphate ophthalmic solution, EGP-437, using the EyeGate® II Drug Delivery System (EGDS) in patients with macular edema (ME)

This will be a Phase 1b/2a, exploratory, open-label study, in which up to 20 eligible ME patients will be enrolled at up to 5 clinical sites in the U.S. Twenty eyes of 20 patients will be enrolled which means that only one eye will be treated with study treatment in patients who present at Visit 1 with bilateral ME. In situations where both eyes of a patient are eligible for the study, the eye with the shorter duration of ME will be the study eye.9 The investigator will designate the study eye when both eligible eyes have been diagnosed with ME at the same time. Potential patients who are interested in participating in the study will be provided an informed consent form (ICF) prior to screening. Patient eligibility will be assessed at Visit 1 (Day 0), the baseline visit, by spectral SD-OCT and measurement of IOP, in addition to review of the patient's medical and ophthalmic history and recent concomitant medications history. Study Treatment will be administered on Day 0, Day 4, and Day 9 (Visits 1, 2, and 3). Subjects will be scheduled to return to the clinic for post-treatment assessments during Visits 4 and 5 (Day 14 and Day 21 or Day 28).

Inclusion Criteria:

• 1. Age 18 to 90 years 2. Have diagnosis of ME secondary to one of the following diagnosed conditions:

  1. Central or branch retinal vein occlusion (CRVO or BRVO) with a mean CST ≥ 300µm on SD-OCT images taken at the baseline visit (Day 0)

  2. Diabetic macular edema (DME) with a mean CST ≥ 300µm on SD-OCT images taken at the baseline visit (Day 0)

  3. Cystoid macular edema (CME) secondary to having undergone a previous PPV and having a mean CST ≥ 300µm on SD-OCT images taken at the baseline visit (Day 0) having a history of previous positive response to steroid treatment 3. Receive, understand, and sign a copy of the ICF 4. Be able to return for all study visits and willing to comply with all study related instructions

     Exclusion Criteria: