As my presbyopia progressed I went from single lens to bifocals to trifocals then to progressive. When I first got my bifocals, they were wonderful, and I had little trouble adjusting. Then the trifocals were slightly more difficult, but I soon adjusted and became adept at the head movements to select the correct focal plane.
So when I finally graduated to progressives I already had the head movement training down, and the transition was immediate. Now I wouldn't be without them.
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