Visual Acuity & Refractive Converter
Convert Snellen metric (6/6), Snellen Imperial (20/20), LogMAR, Decimal, and approximate dioptric refractive blur equivalent.
ETDRS Staging Protocol
Diabetic Retinopathy Risk & Screening Calculator
Assess retinal microvascular complication risk based on diabetes duration, HbA1c control, blood pressure, and visual symptoms to determine dilated fundus screening intervals.
Interactive Clinical Assessment
Enter clinical parameters below for immediate computerized evaluation. Results update instantaneously.
Consultant Clinical Insight
"High-precision ophthalmic diagnostics and proactive screening prevent over 80% of preventable visual impairment. Early detection gives patients the greatest opportunity for spectacle freedom and retinal preservation."
Dr. Praveen Kumar
Consultant Cataract, Refractive & Medical Retina Specialist · Dr. Anil Kumar's Eye Hospital
Clinical Background & Evidence Base
Diabetic retinopathy (DR) is the leading cause of preventable blindness in working-age adults. The risk score weights disease duration (linear increase past 10 years), glycemic exposure (HbA1c > 7.0%), systemic hypertension, renal albuminuria, and visual symptoms (floaters, macular blur) according to Early Treatment Diabetic Retinopathy Study (ETDRS) guidelines.
Clinical Staging Reference
| Classification / Stage | Clinical Interpretation & Care Pathway |
|---|---|
| Low Retinal Risk (Score 0 – 3) | Early diabetes with controlled HbA1c. Annual dilated 7-field fundus photography and bio-microscopy recommended. |
| Moderate Risk / Potential Early NPDR (Score 4 – 7) | Elevated microvascular stress. Dilated retinal examination advised every 6 months with macular OCT scanning to detect subclinical diabetic macular edema (DME). |
| High Retinopathy Risk (Score 8 – 11) | Significant threat of vision-threatening proliferative DR or DME. Dilated examination within 2–4 weeks; fundus fluorescein angiography (FFA) may be required. |
| Critical Retinal Urgency (Score 12+ or Acute Distortion) | High likelihood of vitreous hemorrhage, neovascularization, or macular detachment. Immediate consultation for anti-VEGF injections or pan-retinal photocoagulation (PRP). |