From Eschenbach:
Foster Grant Multi Focus Advanced Reading Glasses feature polycarbonate lenses for the best clarity, 3-lens strengths, a 5-layer anti-reflective (AR) coating to reduce glare, and UV380 protection with enhanced pupillary distance.
The James features a black frame with gun metal trim, constructed with core wire and sturdy metal spring hinges. Six magnification options are available: +1.00, +1.50, +1.75, +2.00, +2.50, and +2.75 for a wide range of magnification.
The highest power in the lens is found in the bottom part of the lens (for reading) and the magnification power at the top of the lens is half the power of that on the bottom, with the middle part of the lens at a magnification level in between. For example: if the magnification is listed as +2.50D, the bottom part of the lens is +2.50D, the top portion of the lens is +1.25D and the middle portion is approximately +1.88D. Keep in mind, products are identified by the highest power in the lens.
