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Updated: Aug 9, 2026
10:46
Doppler Optical Coherence Tomography of Retinal Circulation
Published on: September 18, 2012
Retinal blood flow in diabetic retinopathy
1Department of Medicine, Royal Postgraduate Medical School, Hammersmith Hospital, London.
BMJ (Clinical Research Ed.)
|September 19, 1992
Summary
Diabetic retinopathy significantly increases retinal blood flow compared to controls. Managing blood sugar and pressure is crucial for reducing vision loss in diabetic patients.
Area of Science:
- Ophthalmology
- Diabetology
- Vascular Biology
Background:
- Diabetic retinopathy is a leading cause of vision loss.
- Understanding retinal hemodynamics is key to managing diabetic retinopathy.
- Previous studies have shown alterations in retinal blood flow in diabetes.
Purpose of the Study:
- To quantify retinal blood flow parameters in diabetic patients with varying stages of retinopathy and in non-diabetic controls.
- To develop a hemodynamic model for diabetic retinopathy pathogenesis.
Main Methods:
- Laser-Doppler velocimetry and computerized image analysis were employed.
- A cross-sectional study design included 24 non-diabetic controls and 76 diabetic subjects.
- Retinal blood flow and conductance were the primary outcome measures.
Main Results:
- Retinal blood flow was significantly elevated in all grades of untreated diabetic retinopathy compared to controls and diabetics without retinopathy.
- Pan-retinal photocoagulation led to a significant decrease in retinal blood flow.
- Increased retinal blood flow and conductance were observed in untreated diabetic retinopathy, independent of other clinical factors.
Conclusions:
- Elevated retinal blood flow is a hallmark of diabetic retinopathy.
- These findings underscore the importance of controlling hyperglycemia and hypertension to mitigate diabetic retinopathy progression and associated morbidity.
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