## Risk Factors for POAG Progression **Key Point:** Established risk factors for progression in POAG include elevated baseline IOP, thin central corneal thickness, advanced age, and optic disc hemorrhage. Serum cholesterol is NOT a recognized independent risk factor for glaucomatous progression. ### Established Progression Risk Factors | Risk Factor | Evidence | Clinical Significance | |---|---|---| | Baseline IOP > 26 mmHg | Strong (OHTS, EGPS) | Higher baseline = faster VF loss | | Thin CCT (< 555 μm) | Strong (OHTS) | Reduces structural support; increases risk 3-fold | | Advanced age (> 65 years) | Strong (AGIS, CIGTS) | Faster progression rate | | Optic disc hemorrhage | Strong | Marker of active disease | | Exfoliation syndrome | Strong | More aggressive course | | Myopia | Moderate | Structural vulnerability | | Serum cholesterol | NOT established | No causal link in glaucoma literature | **High-Yield:** The Early Manifest Glaucoma Trial (EMGT) and Ocular Hypertension Treatment Study (OHTS) identified IOP, age, CCT, and baseline VF damage as key predictors. Systemic lipid levels do not correlate with glaucomatous progression. **Clinical Pearl:** While hypertension and diabetes are systemic comorbidities in glaucoma patients, they are not independent risk factors for POAG progression itself. Serum cholesterol similarly lacks evidence as a glaucoma progression factor. ### Why Serum Cholesterol Is Not a Risk Factor - No mechanistic link between lipid metabolism and retinal ganglion cell apoptosis in POAG - Lipid-lowering therapy does not slow glaucoma progression - Large prospective studies (OHTS, EGPS) did not identify cholesterol as a predictor - Confusion may arise from cholesterol's role in vascular disease, but POAG is not primarily vasculopathic
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