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How Constant High Blood Glucose Damages the Retina — And What You Can Do About It

Nick Howarth

Published on: 15/02/2026

Blindness rarely happens overnight. In most cases, it develops quietly, gradually, and predictably. One of the most common causes of vision loss worldwide is damage from chronically elevated blood glucose. Not a single sugary meal. Not a dessert on a birthday. But sustained, repeated, elevated glucose over years.