Related Experiment Video
Updated: Aug 8, 2026
04:36
An Assay to Detect Protection of the Retinal Vasculature from Diabetes-Related Death in Mice
Published on: January 12, 2024
Diabetic retinopathy: an historical assessment
George Kalantzis1, Michael Angelou, Effie Poulakou-Rebelakou
1Department of History of Medicine, Athens University Medical School, Athens, Greece. drgeorgekalantzis@hotmail.com
Hormones (Athens, Greece)
|May 27, 2006
Summary
Diabetic retinopathy, a diabetes complication, causes blindness. Intensive blood sugar control is key to preventing its onset and progression.
Area of Science:
- Ophthalmology
- Endocrinology
- Medical History
Background:
- Diabetic retinopathy is a serious microvascular complication of diabetes mellitus.
- It is a leading cause of new-onset blindness globally.
- Understanding its progression is crucial for patient outcomes.
Observation:
- Early observations by Eduard Jäger in 1855 noted diabetic macular changes.
- Histopathological proof of cystoid macular degeneration in diabetics was provided by Edward Nettleship in 1872.
- Wilhelm Manz described proliferative changes and associated complications in 1876.
Findings:
- Arthur James Ballantyne's 1943 work identified diabetic retinopathy as a distinct vascular disease.
- Recent multi-centered trials have elucidated the natural history of the condition.
- Intensive glycemic control significantly reduces the risk and progression of diabetic retinopathy.
Implications:
- Highlights the long-standing recognition and evolving understanding of diabetic retinopathy.
- Emphasizes the critical role of diabetes management in preventing vision loss.
- Informs clinical practice and future research directions for managing diabetic eye disease.
Related Concept Videos
01:27Diabetic Retinopathy
DefinitionDiabetic retinopathy is a microvascular complication of diabetes affecting the retinal blood vessels.Risk FactorsDiabetic retinopathy is present in almost all individuals with type 1 diabetes and more than 60% of those with type 2 diabetes after two decades of disease.The risk increases with poor glycemic control, hypertension, dyslipidemia, smoking, pregnancy, and puberty.Although cataracts and glaucoma are also more frequent in people with diabetes, retinopathy remains the leading...
01:28Diabetic Nephropathy
Definition Diabetic nephropathy is a chronic kidney complication that results from prolonged hyperglycemia.Prevalence It is the most common cause of chronic kidney disease (CKD) and end-stage renal disease (ESRD) worldwide, affecting up to half of individuals with diabetes.Pathophysiology • Sustained hyperglycemia triggers multiple hemodynamic and metabolic changes in the kidney. • Early in the disease, increased renal blood flow and glomerular hyperfiltration occur due to afferent arteriolar...
01:25Type II Diabetes Mellitus III: Clinical Manifestations and Diagnosis
Type 2 diabetes mellitus develops gradually and is often asymptomatic in early stages.Clinical ManifestationsWhen symptoms appear, they include fatigue, blurred vision, pruritus, delayed wound healing, and recurrent infections, particularly candidal infections. Peripheral neuropathy may present as numbness or tingling in the extremities. Classic hyperglycemia symptoms—polyuria, polydipsia, and polyphagia—are less common. Most patients are overweight and frequently have associated hypertension...
01:22Diabetic Neuropathy
DefinitionDiabetic neuropathy is nerve damage caused by long-standing diabetes mellitus. It results directly from prolonged high blood sugar levels.PathophysiologyThe pathophysiology of diabetic neuropathy involves both metabolic and vascular disturbances triggered by chronic hyperglycemia.Metabolic injury: Elevated glucose levels activate the polyol pathway within nerve cells, leading to the accumulation of sorbitol and fructose. This increases oxidative stress, disrupts normal nerve...
01:22Complications of Diabetes Mellitus
Diabetes mellitus is a chronic metabolic disorder characterized by persistent hyperglycemia due to insulin deficiency, resistance, or both. Prolonged hyperglycemia disrupts metabolic homeostasis and leads to acute and chronic complications.Acute ComplicationsAcute complications result from sudden metabolic imbalance.Diabetic ketoacidosis (DKA) mainly appears in type 1 diabetes but may also develop in type 2 diabetes, particularly under extreme stress. It arises from severe insulin deficiency,...
01:19Type I Diabetes III: Clinical Manifestations
Type 1 diabetes mellitus typically presents with rapid-onset symptoms due to the body’s inability to utilize glucose in the absence of insulin. Since insulin is required for glucose uptake into cells, its deficiency leads to hyperglycemia and cellular energy deprivation, resulting in characteristic clinical features.Polyuria and PolydipsiaOne of the earliest, most prominent symptoms is polyuria (excessive urination). When blood glucose concentrations rise above the renal threshold, the kidneys...