You need to get some bigger lense glasses and have them cut the bi focal in the top and bottom. Occupational Bifocals and Trifocals.Im hard on glasses. Same thing, in and out of the pocket, they fall on floor. Thats the thing about readers. I cant use bifocals due to needing glasses to work on cars from below as well from above. They tried to sell progressives, i hated them. Soon i will need two pairs.