Diabetic Macular Edema Center-involved

These are optical coherence tomography (OCT) scans of a 76-year-old man with center-involved diabetic macular edema (yellow arrows). His visual acuity has fluctuated from 20/25 to 20/32 over the past 10 years. The patient was diagnosed with diabetes mellitus in 1998. This progressed into diabetic macular edema in 2006. He received intravitreal Avastin in March, May, and June of 2007 but decided to stop treatment. He opted for a focal laser in July of 2009, but once again decided to stop treatment. He then received intravitreal Lucentis injections in Sept. 2014, followed by intravitreal Eylea injections in July 2016. No injection has caused the edema to resolve. It has been two years since his last injection, but his visual acuity has remained stable around 20/25. This case shows that it is possible for mild diabetic macular edema to persist with minimal effect on visual acuity.