Benedi-Garcia Clara, Concepcion-Grande Pablo, Chamorro Eva, Cleva Jose Miguel, Alonso José
Clinical Research Department, Indizen Optical Technologies, 28002 Madrid, Spain.
Life (Basel). 2024 Sep 19;14(9):1178. doi: 10.3390/life14091178.
Power distribution of progressive power lenses provides usable regions based on power distribution analysis. However, recent studies demonstrated that these regions are not always used for certain tasks as predicted. This work determines the concordance between the actual region of lens use and compares it with the theoretically located regions. The pupil position of 26 subjects was recorded using an eye-tracking system (Tobii-Pro-Glasses 3) at distance and near-reading tasks while wearing a general use progressive power lens. Subjects were asked to read aloud a text showed on a screen placed at 5.25 m and 37 cm while looking though the central and lateral regions of the lens. The pupil position was projected onto the back surface of the lens to obtain the actual region of use for each fixation. Results showed that the actual region of use matched with the theoretically located. On average, the concordance between the actual and theoretical regions of use was 85% for a distance-reading task and 73% for a near-reading task. In conclusion, the proposed method effectively located the actual regions of the lens used, revealing how users' posture affects lens usage. This insight enables the design of more customized progressive lenses based on the areas used during vision-based tasks.
渐进多焦点镜片的屈光力分布基于屈光力分布分析提供了可用区域。然而，最近的研究表明，这些区域并不总是如预期那样用于某些任务。这项工作确定了镜片实际使用区域之间的一致性，并将其与理论定位区域进行比较。在26名受试者佩戴普通渐进多焦点镜片进行远距和近读任务时，使用眼动追踪系统（Tobii-Pro-Glasses 3）记录他们的瞳孔位置。受试者被要求在通过镜片的中央和周边区域视物时，大声朗读分别放置在5.25米和37厘米处屏幕上显示的文本。将瞳孔位置投影到镜片后表面，以获得每次注视的实际使用区域。结果表明，实际使用区域与理论定位区域相匹配。平均而言，远读任务中实际和理论使用区域之间的一致性为85%，近读任务中为73%。总之，所提出的方法有效地定位了镜片的实际使用区域，揭示了用户姿势如何影响镜片使用。这一见解有助于基于视觉任务中使用的区域设计更定制化的渐进镜片。
