Josep Vidal-Alaball 1, 2 , MD, PhD, MPH ; Dídac Royo Fibla 3 , BEng ; Miguel A Zapata 3 , MD, PhD ; Francesc X Marin-Gomez 1 , MD, MPH ; Oscar Solans Fernandez 4 , MD 1 Health Promotion in Rural Areas Research Group, Gerència Territorial de la Catalunya Central, Catalan Health Institute, Sant Fruitós de Bages, Spain 2 Unitat de Suport a la Recerca de la Catalunya Central, Institut Universitari d’Investigació en Atenció Primària Jordi Gol, Sant Fruitós de Bages, Spain 3 OPTretina, Sant Cugat del Vallès, Spain 4 eHealth Directorate, Department of Health, Government of Catalonia, Barcelona, Spain ABSTRACT Background: Diabetic retinopathy (DR) is one of the most important causes of blindness worldwide, especially in developed countries. In diabetic patients, periodic examination of the back of the eye using a nonmydriatic camera has been widely demonstrated to be an effective system to control and prevent ...