Online retailers like Zenni Optical and Payne Glasses offer the most affordable prescription glasses, with complete pairs often available for under $15. For a balance of variety and discounts on brand-name frames, GlassesUSA and EyeBuyDirect are top choices, while Costco provides the best value for in-person service. For more detailed comparisons, read the full report at Forbes Vetted . Redditors Name Costco Best for Prescription Glasses Value