Renal anemia refers to anemia in which the absolute or relative production of erythropoietin (EPO) is insufficient due to various kidney diseases, and uremic toxins affect erythropoietin production and its lifespan. Common treatment drugs for renal anemia include erythropoietin EPO and Roxadustat (FG-4592). Medical history information was collected from patients with renal anemia who visited the ophthalmology department with dry eye symptoms. This study will help to determine the function and morphological characteristics of meibomian gland in patients with renal anemia