A large number of experimental studies have demonstrated that microvascular pericytes play a major role in the early prevention and treatment of diabetic retinopathy.To observe and study the structural and functional changes of microvascular pericytes in early diabetic retinopathy,we review the literature on the origin,morphological distribution,physiological function,and cell culture and identification of microvascular pericytes,the relationship between pericyte apoptosis and diabetic retinopathy,and the traditional Chinese medicine prevention and treatment of diabetic retinopathy,so as to pr...