Out of darkness comes light—is there a role for light masks in treatment of diabetic macular oedema?

Diabetic macular edema (DME) is a significant cause of visual impairment in working aged adults, with an estimated global prevalence of 7% of all diabetic patients (1). Its relative importance continues to rise, with vision loss from DME now surpassing proliferative diabetic retinopathy (PDR) as the leading cause of vision impairment from diabetes in developing countries (2).