Objective: This study is aimed at investigating the knowledge, practice and attitude of the patients with type-2 diabetes mellitus regarding diabetic retinopathy in Saudi Arabia. Introduction: Diabetes self-management is defined as a crucial factor in patients’ care. Many studies show that the lack of sufficient knowledge, good practice, and positive attitude among the patients concerning their disease and its complications is due to illiteracy. Therefore, presenting knowledge, practices, and attitudes towards the management of diabetes should be done before considering any possible intervention. The materials and methods section explains the data collection and analysis along with their limitations. In the results part, the data collected from each section are explained and summarized in tables. In the discussion section, the results are explained and then related to the previous studies. Then the conclusion sums up all the results found and subsequently recommends the best way for the future researchers to improve the results of the research.