RELATIONSHIP BETWEEN DIABETIC RETINOPATHY AND ITS SEVERITY AND HEALTH-RELATED QUALITY OF LIFE USING NATIONAL EYE INSTITUTE VISUAL FUNCTION QUESTIONNAIRE Journal title: Acta HealthMedica Authors: Masoud Reza Manaviat, Nasim Namiranian, Mahboube Kermanian, Elahe Dehestani Ardakani Subject(s):