New Eye Technology Detects Subtle Blood Vessel Changes at Type 1 Diabetes Diagnosis

Researchers at an Irish medical center used a specialized imaging technique called optical coherence tomography angiography (OCTA) to examine the eyes of 50 newly diagnosed children with Type 1 diabetes and compare them to 50 children without diabetes. OCTA creates detailed pictures of the tiny blood vessels in the retina, the light-sensitive tissue at the back of the eye.

The study focused on the deep capillary plexus—a network of extremely small blood vessels in the inner layers of the retina. While the outer network of blood vessels (called the superficial capillary plexus) looked normal in children with newly diagnosed Type 1 diabetes, the deeper network showed measurable differences compared to children without diabetes.

Across the whole retina, children with newly diagnosed Type 1 diabetes had lower vessel density in the deep capillary plexus (53.1% compared to 54.6% in the control group). Similar reductions were found in specific regions around the macula, the area responsible for sharp central vision.

These differences were small but statistically significant, meaning they were unlikely to have occurred by chance. Importantly, no visible signs of diabetic retinopathy—the condition that usually develops after years of high blood sugar—were present in any of the newly diagnosed children at the time of imaging.

The researchers found that children with higher blood sugar levels at diagnosis (measured by HbA1c) had greater reductions in deep capillary plexus density. Additionally, children who experienced diabetic ketoacidosis—a serious condition where the blood becomes too acidic—showed more pronounced changes in these blood vessels, and the severity of the ketoacidosis was linked to the degree of vessel density reduction.

These associations suggest that the metabolic stress of uncontrolled diabetes at diagnosis may directly affect the tiny blood vessels in the eye, even before causing any clinically visible damage.

This research demonstrates that advanced imaging can detect changes in retinal blood vessels at the very moment Type 1 diabetes is diagnosed. The findings suggest that the eyes may show signs of metabolic stress earlier than doctors can detect through standard eye exams.

While this study provides important information about what happens at diagnosis, it does not establish whether these early changes predict future eye complications or how they progress over time. Additional research will be needed to determine whether monitoring these blood vessel changes could help guide treatment decisions or help identify children who may be at higher risk for retinopathy later.

Source: Irish journal of medical science. Evidence type: PubMed indexed literature. Type1Cure is an information and intelligence hub, not a medical advice service. This article summarizes published research and does not provide diagnosis, treatment, or personal medical guidance. Always talk to your own care team before changing anything about your Type 1 diabetes management.