Numerous tests were carried out to determine the size and the position of the reading zone. Our experience is that almost all customers are fully satisfied with the glasses after a short familiarization period (a few minutes to a few hours). In the beginning, the reading zone is perceived consciously or possibly as somewhat disturbing. However, the eye and brain get used to the reading zone very quickly. After that it is no longer perceived consciously. In general, getting used to the Eagle Five (bifocal) is much quicker and easier compared to goggles. Here the reading zone may be a little too high. In this case the SL2 Pro and SL2 Pro PP are better suited because the width of the nose bridge and thus the position of the reading zone can be adjusted.