Lens-Viewpoint Extraction Method for Personalized Progressive Addition Lens Fitting.

PURPOSE: To validate the accuracy of a lens-viewpoint extraction method and demonstrate its feasibility for tracking users' visual behavior on progressive addition lenses (PALs). This aims to provide a quantifiable fitting solution for PAL wearers in the future.

METHODS

We evaluated a method using eye-tracking technology to extract the viewpoint on the lens, implemented with a self-made setup. Accuracy verification experiments were performed using a mechanical artificial eye, and a clinical test on 10 subjects was performed to assess the accuracy of the method and explored its feasibility.

RESULTS

The accuracy of the lens-viewpoint extraction method was verified to be 0.21 ± 0.06 mm and 0.30 ± 0.07 mm on the lens in the mechanical artificial eye experiment and clinical test, respectively. An exemplary analysis of user eye behavior on the lens was provided.

CONCLUSIONS

These results demonstrate that the lens-viewpoint extraction method achieves high accuracy and is feasible for tracking users' personalized visual habits on the lens.

TRANSLATIONAL RELEVANCE: The lens-viewpoint extraction method introduced in this study shows significant potential for providing a quantifiable solution to improve wearing comfort for the presbyopia population, holding important translational value in the field of precision optometry.