להטוטנות פלפל הכרה uses of bifocal lens תנודתיות סבל מנגה
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Bifocal lenses: types and principles
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Amazon.com: LifeArt Bifocal Reading Glasses with Round Lenses, Blue Light Blocking Glasses for Women, Anti Glare, Reduce Eyestrain (Pinkfloral, +0.00/+2.00 Magnification) : Health & Household