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Related Concept Videos

Diabetic Retinopathy01:27

Diabetic Retinopathy

55
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...
55
Diabetic Nephropathy01:28

Diabetic Nephropathy

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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...
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Retinal Sensitivity and Retinal Perfusion in Diabetic Retinopathy.

Jennifer A Hamilton-Perais1, David M Wright2, Amelia Lim1,3

  • 1The Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast, Northern Ireland, United Kingdom.

JAMA Ophthalmology
|October 30, 2025
PubMed
Summary
This summary is machine-generated.

Diabetic retinopathy (DR) patients showed retinal sensitivity loss in perfused areas and normal function in nonperfused areas. Despite poor glycemic control, sensitivity deficit decreased over time, impacting DR management and clinical trials.

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Area of Science:

  • Ophthalmology
  • Diabetic Retinopathy Research
  • Retinal Imaging Analysis

Background:

  • Retinal capillary nonperfusion is critical in diabetic retinopathy (DR) pathogenesis, with no current treatments to prevent or reverse it.
  • Understanding the link between nonperfusion and visual sensitivity in DR is essential for effective patient management.

Purpose of the Study:

  • To investigate the association between retinal capillary perfusion and visual sensitivity in patients with diabetic retinopathy.
  • To analyze changes in retinal sensitivity and perfusion over a 2-year period in a cohort of DR patients.

Main Methods:

  • A prospective, longitudinal cohort study involving 44 adults with moderate to very severe DR.
  • Utilized 110° projection perimetry for retinal sensitivity and ultra-widefield angiography for retinal perfusion assessment.
  • Follow-up assessments were conducted at 1 and 2 years, with masked outcome evaluation.

Main Results:

  • Baseline retinal sensitivity deficit was significantly larger in nonperfused areas compared to perfused areas (P < .001).
  • Sensitivity deficit decreased over time (approx. 45% in the first year), even with poor glycemic control and high DR grades.
  • While perfusion status correlated with function, some perfused areas showed sensitivity loss and vice versa, indicating complex relationships.

Conclusions:

  • Retinal capillary perfusion status is associated with visual function in DR, but the relationship is not absolute.
  • Sensitivity deficits can decrease over time in DR patients, irrespective of glycemic control, suggesting potential for visual recovery or adaptation.
  • Findings necessitate consideration in DR management strategies and clinical trial designs for this sight-threatening condition.