“…Regarding the diagnostic criteria for diabetic retinopathy, seventeen studies used the ETDRS [ 27 , 30 , 32 , 33 , 35 – 38 , 42 , 43 , 51 – 53 , 56 , 63 , 65 , 67 ], thirteen used the GDRPG [ 39 – 41 , 44 – 46 , 50 , 54 , 58 , 61 , 66 , 68 , 69 ], six the SDRGS [ 47 , 53 , 57 , 60 , 62 , 64 ], three used the American Academy of Ophthalmology guidelines [ 28 , 29 , 49 ], three used the L’ Esperance classification [ 31 , 34 , 48 ], and one used the Revised English Diabetic Eye Screening Program Grading System (REDESPGS) [ 55 ].…”