 | Gradal® Brevis is fitted in the usual way: position the centration crosses on the pupil centres, with the patient looking straight ahead (distance PD) and his or her head and body in a natural posture.
For easy recognition, a "B" is visible under the nasal "Z" engraving of Gradal® Brevis. This is followed by the code for the refractive index, here 50 which stands for n =1.50. The figure engraved under the temporal "Z" symbol indicates the addition which corresponds to the value measured in refraction and hence to the value ordered.
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