We all complain as soon as we can no longer put our thread in the hook eye as soon as the size of the hook is less than 14. Here’s the solution. Soft bifocal lenses that attach to the inside of the glasses. And can be moved from one pair to another. Instructions for use in French and English. These lenses are available with 1.5, 2.0, 2.50 and 3.0 diopters.