Age-Related Macular Degeneration vs Diabetic Retinopathy
Age-Related Macular Degeneration and Diabetic Retinopathy are easy to mix up on the boards. Here's a side-by-side comparison — presentation, workup, imaging, and first-line treatment — drawn from our full outlines.
Age-Related Macular Degeneration vs Diabetic Retinopathy at a glance
- Age-Related Macular Degeneration: Central retinal degeneration — dry (atrophic) and wet (neovascular) forms; leading cause of central vision loss in older adults.
- Diabetic Retinopathy: Microvascular retinal disease from chronic hyperglycemia — leading cause of new-onset blindness in working-age adults.
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Side-by-side comparison
| Feature | Age-Related Macular Degeneration | Diabetic Retinopathy |
|---|---|---|
| At a glance | Central retinal degeneration — dry (atrophic) and wet (neovascular) forms; leading cause of central vision loss in older adults. | Microvascular retinal disease from chronic hyperglycemia — leading cause of new-onset blindness in working-age adults. |
| Classic presentation | Drusen on fundoscopy in dry AMD; sudden metamorphopsia with subretinal fluid and hemorrhage in wet AMD.; Dry AMD: gradual painless central blurring, difficulty reading, central scotomas; often asymptomatic early; Wet AMD: SUDDEN-onset central distortion (metamorphopsia — straight lines look wavy), central scotoma, or decline in vision… | Dot-blot hemorrhages with hard exudates and microaneurysms in a diabetic; neovascularization of the disc (NVD) in PDR.; Often ASYMPTOMATIC until advanced or DME develops — emphasizes screening; Blurred or fluctuating vision (often with glycemic swings); Floaters or sudden vision loss — vitreous hemorrhage from PDR; Curtain over vision —… |
| Workup / key labs | Not routinely indicated for diagnosis | ADA / AAO screening: dilated exam at diagnosis in type 2 DM and within 5 years of diagnosis in type 1 (and at puberty), then annually (or every 1-2 years if no retinopathy and good glycemic control). Pregnant diabetic patients: exam in first trimester and as indicated.; A1c, lipid panel, BMP, urine albumin-creatinine — for diabetic… |
| Imaging | Dilated fundus examination; Optical coherence tomography (OCT) — primary imaging modality; detects intraretinal/subretinal fluid, drusen, RPE elevation, geographic atrophy; OCT angiography (OCTA) — non-invasive detection of CNV; Fluorescein angiography — gold standard for CNV; defines lesion type (classic vs occult); Indocyanine green… | Dilated fundus examination — primary screening tool; Optical coherence tomography (OCT) — quantifies retinal thickness and DME; Fluorescein angiography — identifies capillary nonperfusion, microaneurysms, leakage, and neovascularization; OCT angiography — non-invasive vascular imaging; Wide-field fundus photography — increasingly used… |
| First-line treatment | Smoking cessation — modifiable risk factor with strongest evidence; Mediterranean-style diet rich in leafy greens, fish (omega-3), and colored fruits; Cardiovascular risk factor management (blood pressure, lipids, weight); UV protection with sunglasses; Amsler grid self-monitoring for new distortion → urgent ophthalmology if change;… | Optimize glycemic control — target A1c individualized but typically <7% (DCCT, UKPDS); Blood pressure control — typically <130/80 (UKPDS); Lipid management — statin per ASCVD guidelines; fenofibrate has independent benefit on DR progression (ACCORD Eye, FIELD); Smoking cessation; treat sleep apnea and anemia; Adherence to dilated… |
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