Diabetic Retinopathy
Definition
Progressive damage to the blood vessels of the retina caused by chronic hyperglycemia, representing the leading cause of blindness in working-age adults (ages 20 to 74). Diabetic retinopathy progresses through stages from mild nonproliferative (microaneurysms) to proliferative (abnormal new blood vessel growth) and can cause vision loss from macular edema or retinal detachment. The DCCT trial demonstrated that intensive glucose control reduces retinopathy risk by 76%, and CGMs facilitate the tight glucose management needed to prevent or slow progression.
Why “Diabetic Retinopathy” Matters for Glucose Monitoring
Understanding diabetic retinopathy is essential for anyone using or evaluating a continuous glucose monitor. This concept directly affects how CGM devices are designed, how glucose data is interpreted, and how clinical decisions about blood sugar management are made. Medical terms related to glucose physiology help patients and clinicians communicate effectively about blood sugar patterns, treatment goals, and the clinical significance of CGM data.
This term applies broadly across all continuous glucose monitors and is foundational knowledge for interpreting CGM data, whether you are managing diabetes or using a sensor for metabolic wellness.
Related Terms
Abnormally high blood glucose, generally defined as levels above 180 mg/dL after meals or above 130 mg/dL fasting.
Hemoglobin A1C is a blood test that measures the percentage of hemoglobin proteins coated with sugar, reflecting average blood glucose levels over the previous 2 to 3 months.
The percentage of time a person's glucose level remains within a defined target range, typically 70 to 180 mg/dL for most people with diabetes.