What we offer is NOT zero-power sunglasses, we offer prescription sunglasses at wholesale prices. We welcome small optical stores to request a free portfolio of optical frames from us for displaying in your store. When your customers select the frames in your window which are from us, you can just advise us together with the customer's prescription, and we then fit the lenses using the selected frame in stock and send the whole pair of RX sunglasses to you. Please contact us at service@firmoo.com if you have interest.