Buying glasses from flat photos has always been a little absurd. Frames are face-shaped, faces vary enormously, and a product photo tells you almost nothing about fit. Eyewear is the purest AR use case in ecommerce. - Accurate face mapping, so frames sit where they would actually sit. Cheap implementations place frames approximately, and approximately looks ridiculous. - True-to-scale rendering, so sizes read correctly. - Dead-simple interface: shoppers should be trying frames in seconds, not calibrating. - Put the try-on right on the augmented reality product page, next to the price and the buy button. - Show the price next to the try-on. AR that hides the price feels like a trap. - Wrong-fit returns are the silent killer in eyewear, and honest try-before-you-buy previews cut into them. Shoppers forgive a lot. They do not forgive looking silly. ARCommerce tracks eyewear brands with virtual try-on among its 68 brands, and ModelSnap generates the 3D models these experiences are built on, $4.99 per HD model.