Author: The problem with mail order and internet purchases is that shipping costs can sometime be prohibitive, especially when making multiple orders. At Zenni Optical, The #1 online Rx glasses store, shipping is a fixed amount regardless of ordered quantity. This can be a significant saving aside from the Lowest Price Progressive Glasses which practically sold for US$30 at Zenni Optical. With Eric’s Review of Zenni Optical, consumers are guaranteed of satisfaction.