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You can simply upload a digital copy of your doctor's written form.

Popular options include Anti-Reflective (reduces glare), Digital Block (filters blue light from screens), and Super Hydrophobic (repels water and grease for easier cleaning). GlassesUSA.com: The #1 Store for Glasses Online

You can find your current measurements (usually on the inside of the temple arm) and enter them into the Frame Size Finder tool to ensure a comfortable fit. classesusa.com

Once you've picked a frame, you'll select your lens type and functional coatings:

Before you shop, you need a valid prescription from an optometrist. If you already have glasses but lost your paper prescription, GlassesUSA.com provides three ways to get it: You can simply upload a digital copy of

Choose from single-vision (reading or distance), progressives, or bifocals.

Choosing frames online is made easier through several interactive features: Once you've picked a frame, you'll select your

Manually enter the values (sphere, cylinder, axis, and pupillary distance ) yourself. 2. Finding the Right Fit and Style