Both varifocal lenses and bifocal lenses are used to correct both distance and near vision in one pair of glasses, but crucially they do this in a very different way. There is no clear distinction between the two prescriptions in a varifocal. The distance prescription very gradually and smoothly develops into the reading prescription down through the lens.
At Eyeful Tower we use the latest in digital measurement technology to ensure that your varifocal lenses are fitted to your chosen frame perfectly. This system will take dozens of measurements to within one tenth of a millimetre, adjusting for asymmetry and pantoscopic angle.