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. 2022 Jun 30;15(2):10.16910/jemr.15.2.6.
doi: 10.16910/jemr.15.2.6. eCollection 2022.

Eye movements as a predictor of preference for progressive power lenses

Pablo Concepcion-Grande  1   2 , Amelia González  1   2 , Eva Chamorro  1 , José Miguel Cleva  1 , José Alonso  1 , Jose Antonio Gómez-Pedrero  3
Affiliations

Eye movements as a predictor of preference for progressive power lenses

Pablo Concepcion-Grande et al. J Eye Mov Res. .

Abstract

The purpose of this study is to determine if there is any correlation between the characteristics of the user's eye movements (EMs) and the preference of the user when wearing different Progressive power lenses (PPLs) distributions. An eye-tracker system with a sample rate of 120Hz and temporal resolution of 8.3ms (Tobii-X3-120) was used to register EMs of 38 PPL users when reading in a computer screen with 2 types of PPLs (PPLsoft and PPL-hard). Number of fixations, complete fixation time, fixation duration mean, saccade duration mean, saccade distance mean, and number of regressions were analyzed for 6 different regions of the computer screen. A statistically significant difference was observed between the characteristics of the user's EMs and the user's PPL subjective preference (p < 0.05*). Subjects that preferred the PPL-hard presented significantly lower complete fixation time, lower fixation duration mean and lower number of regressions than those subjects indicating a preference for the PPL-soft. Results of this study suggest that eye-tracking systems can be used as PPL design recommendation systems according to the user EMs performance.

Keywords: complete fixation time; eye tracking; fixation duration mean; progressive power lenses; visual perception.

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Conflict of interest statement

The author(s) declare(s) that the contents of the article are in agreement with the ethics described in http://biblio.unibe.ch/portale/elibrary/BOP/jemr/ethics.html and that there is no conflict of interest regarding the publication of this paper.

Figures

Figure 1.
Figure 1.
Power distribution maps of the PPL designs tested in this study. A) Cylinder power distribution maps and visual area according to Sheedy criteria of the PPL-soft lens. B) Cylinder power distribution maps and visual area according to Sheedy criteria of the PPL-hard lens. C) Progression profile. D) Sheedy’s contours (36; 37).
Figure 2.
Figure 2.
Scheme of the evaluation of EMs using eye tracking technology. Characteristics of the reading test indicating the different reading areas analyzed (rows and columns).
See this image and copyright information in PMC

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