The visual axis is a determining parameter in the adaptation and customization of progressive lenses.
Different studies and research carried out at the University Institute of Applied Ophthalmobiology (IOBA) of the University of Valladolid, confirm that lens centering based on the foveolar visual axis is the most suitable method to avoid misfits and the one that yields the best results in the customization of progressive lenses.
The Ergofocus system, developed by Lentitech Technologies, based on inertial measurements, has been used as a test bench for these analyses.
One of these research works is part of the doctoral thesis defended by the optician-optometrist of the University of Valladolid, Óscar García, entitled “Application of the measurement of the distance to the foveal fixation axes in the adaptation of customized multifocal lenses”.
The study was carried out with the Ergofocus System of Lentitech Technologies and with progressive lenses of the ID range donated by the Japanese company HOYA, designed with different INSETs.
On the other hand, a study conducted by the Optometry Research Group of the University Institute of Applied Ophthalmobiology (IOBA) of the University of Valladolid, compared lenses with standard and customized INSET, but all adapted with Ergofocus measurements.
The results reflect a 97% adaptation rate in all groups participating in the research; 100% in those who had never used progressive lenses; also 100% in people who used progressive lenses, but were not comfortable with them; 89% in progressive lens wearers and 94% in those who had abandoned them due to maladaptation. These results were published in Nature.
These percentages demonstrate the reliability of the measurements achieved with the Ergofocus system using the foveolar visual axis as a reference.
