Application of plasminogen for preventing or treating retinopathy caused by diabetes mellitus; further providing a novel treatment strategy for treating different types of diabetes-related retinopathy.本發明涉及纖溶酶原在預防或治療由糖尿病引起的視網膜病變方面的作用,進而為治療不同類型的糖尿病相關的視網膜病變提供全新的治療策略。