Buying glasses and contacts online is a highly effective way to compared to brick-and-mortar stores. While retailers like GlassesUSA and Zenni Optical offer a massive selection of frames, the process requires more personal "legwork" to ensure prescription accuracy. Quick Comparison: Buying Online vs. In-Store Online Retailers In-Store (Optician) Cost Substantially lower (often 50% less) Higher due to markup and service fees Selection Staggering array of shapes and colors Limited to what's physically in stock Convenience Shop from home; door-to-door delivery Requires at least two physical visits Accuracy Higher risk of "mishaps" (PD/seg height errors) Professional measurements ensure precise fit Top-Rated Online Retailers How to Order Prescription Glasses Online LIKE A PRO