384 VDU spectacles Focus types Nahcomfort • the wearer’s usual reading prescription is found in the lower part of the lens. • the prescription value gradually becomes weaker further up the lens (degression, in the upper part of the lens, vision is clear at a maximum distance of approx. 2 m). The transitions between the different zones are smooth, similar to varifocal lenses. • all that is needed to place an order are details of the close-range values and the required design (type A, B, C). • it is necessary to measure the specific height on the basis of the main line of sight. A minimum fitting height of 17 mm in the frame must be observed. Type A Type B Type C Degression** 0.75 dpt Degression** 1.25 dpt Degression** 1.75 dpt Addition < 1.5 dpt. Addition 1.75 to 2.25 dpt. Addition > 2.25 dpt. < 50 years 50 to 55 years > 55 years ** Degression: Correction reduced, based on the close-range value! Posture-related symptoms? The solution – uvex Nahcomfort lenses Avoid posture-related symptoms with VDU spectacles that are individually adjusted to the wearer. Nahcomfort lenses are specially designed to suit computer-based workplaces and provide unrestricted vision at VDU workstations. The advantages are seamless, sharp vision from 30 cm to approx. 2 m. A clear view of keyboard, screen and documents with an ideal head position. This results in a marked reduction in posture-related symptoms, because the head and neck remain in a natural position.
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