Diabetes is a common metabolic disease, which is a metabolic disorder caused by insufficient insulin secretion in the pancreas, mainly glucose metabolism, increased blood sugar and urine sugar, followed by systemic metabolic abnormalities, and can be complicated by a variety of eye pathologies. According to statistics, the incidence of glaucoma in diabetic patients is about 12.6%, which is significantly higher than the incidence in normal people. It has been found that more diabetic patients without proliferative retinopathy have high intraocular pressure, and more non-diabetic patients have a high response to corticosteroid testing than non-diabetic patients. In addition, patients with open-angle glaucoma have a higher rate of positive glucose tolerance tests than non-glaucoma patients, and more diabetic than non-diabetic patients have a 40 mm Hg increase in IOP and reversible visual field defects from topical corticosteroid application. Therefore, glaucoma and diabetes are more closely related, and people with diabetes should be monitored frequently for changes in intraocular pressure and visual fields.