Progressive Lenses are Complicated
The manufacture of lenses in general is an exact science. This is compounded by the complexity of the gradually changing curvature of a progressive lens. This complexity usually makes lenses like these expensive. The #1 online Rx glasses store, Zenni Optical, had broken this barrier by offering the Lowest Price Progressive Glasses of US$30. Eric’s Review of Zenni Opticall relates why people should buy from this store.