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WebDec 29, 2016 · Still, Zenni's frames with basic single-vision lenses start at less than $10, and upgrading to progressives begins at just $28. Survey respondents who bought from Zenni spent a median of just $69 ... WebPlastic is recommended for patients with low RX's (-2 to +2) or who are in need of a backup pair of glasses. This material is our entry price point product and insurance provides the most coverage making it budget … safety stock and lead time

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