According to a recent clinical meta-analysis study, diabetic retinopathy is a serious threat to human vision and will lead to more blindness. Currently, more than 90 million people worldwide are living with diabetic retinopathy, and it is estimated that the number will increase to 180 million in 20 years. The age-standardized incidence of diabetic retinopathy is 34.6%, meaning that at least one in three diabetics will have diabetic retinopathy of varying degrees. The incidence of the more severe proliferative diabetic retinopathy is 6.96% and the incidence of diabetic macular degeneration is 6.81%, both of which can lead to severe vision impairment and even the risk of blindness. Of course, the incidence of type 1 diabetic retinopathy is higher, at 77.3%, compared to 25.2% for type 2 diabetes. But it also suggests that at least a quarter of people with type 2 diabetes will have retinopathy. Fortunately, the study found that African-Americans had the highest incidence of diabetic retinopathy, while Asians had the lowest. The study also showed that the three major risk factors for diabetic retinopathy are the duration of diabetes, the level of blood sugar (i.e., the level of glycated hemoglobin) and the level of blood pressure. That is, the longer the history of diabetes, the higher the blood glucose and the higher the blood pressure, the more diabetic retinopathy there is. There is also a tendency for diabetic macular degeneration to increase in those with cholesterol levels above 4.0 mmol/L. In the fact that the course of diabetes is difficult to change, we can only detect diabetic retinopathy earlier and treat it in time by controlling the blood glucose, blood pressure and blood lipids more strictly, examining the eyes regularly every year, and doing retinal fluorescence angiography or non-dilated retinal photography when available.