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North Dakota | The ones with the bifocal at the top and bottom are called double-d's. I had them for about 10-12 years. They worked nice when I had to work over my head. Putting clutches into Versatiles comes to mind. They took a while to get used to but worked pretty good for me.
I now have to wear tri-focals. Have had a couple of pairs, I still take them off to work on the computer. The lens for mid distance is to narrow to work on the computer comfortably. I also have lines, I tried the progressive lenses but they give the appearance that straight lines are bent/crooked and change as you move your head up and down. | |
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Bifocal advice
