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50 Disclaimer: All references to "bifocals" herein refer to readers having unmagnified lenses containing a "bifocal style" single powered reading glass insert located on the lower portion of the lenses. - Sport & Wrap-Around Bifocal Reading Sunglasses in Black with Amber Driving Lenses by Readers.Sport & Wrap-Around Bifocal Reading Sunglasses in Black with Amber Driving Lenses by Readers. With this style, you'll get 100% UVA/UVB Lens Protection and polycarbonate lenses that meet ANSI Z87.