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While bifocals for reading and computer work are my daily routine, reading printed matter in the form of books and text with smaller print papers, had become difficult. I bought magnifiers that worked well, but they were inconvenient due having to hold the magnifier with one hand and the material being read in the other. I bought 2 strengths, 3.5 & 4.0. This one, 3.5 is the best. The spring hinges adjust to the width of my face, and there is no pressure at all. Holding the material at a comfortable distance of approximately 12 inches is ideal. The price is phenomenal! I love these glasses and will order another pair so that I'll never be without them!