has another and its usually located in the outer corner or bottom center of the lens in order to not interfere with the horizontal field of view. The Bifocal is created and precisely molded as an integral part of the larger lens mold cavity, the most common bifocal strength is 4x-5x magn...
See Near & Far Multifocal Readers Computer Glasses Progressive Multifocus Blue Light Blocking Reading Glasses Glasses for Women & Men BLACK (STRENGTH 3.5X) +14 optionsAvailable in additional 14 options $9.83current price $9.83 More options f...