How Diabetes Affects the Eyes
You may experience temporary blurred vision if your blood sugar levels spike. High blood sugar can change fluid levels or cause the tissues in the eyes to swell. This blurred vision will go away when your blood sugar levels return to normal.
Suppose your blood sugar levels remain high for an extended time. In that case, it can damage the tiny blood vessels in your eyes, increasing your risk of developing diabetic eye diseases, like cataracts, glaucoma, diabetic retinopathy, and diabetic macular edema.
As the disease advances, blood vessels close and become blocked, causing new ones to grow. These new abnormal blood vessels can lead to a series of complications that impact your ocular health.