I went in looking to get one pair of glasses for all occasions and I paid a hefty price for the ones I bought, basically a lines free "trifocal". I was told that if I could not adjust to this kind of lens, I could get a bi-focal made to replace them; so I went for it. But I could not adjust even though I tried for months to do so. So I went back to get bifocals instead but was told that they do not make lines free bifocals! I would not have gone for the trifocals had I known this.
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