Department of Physics and Astronomy, School of Optics and Optometry, University of Florence, Sesto Fiorentino (FI), Italy.
Institute for Research and Studies in Optics and Optometry (IRSOO), Vinci (FI), Italy.
PLoS One. 2023 Apr 12;18(4):e0282947. doi: 10.1371/journal.pone.0282947. eCollection 2023.
The use of smartphones has seen an extraordinary growth in recent years, thus the understanding of visual habits associated with the use of such devices across the lifespan is becoming important. In the present study we measured viewing distance and character size in a group of non-presbyopes (n = 157) and a group of presbyopes (n = 60) while participants read a simple text message on their smartphone. Results showed that non-presbyopes use shorter viewing distances as compared to presbyopes, a behavior causing a significantly higher accommodative demand. Presbyopes also use larger character sizes and this behavior is more evident whenever difficulties in near vision emerge in the Near Activity Visual Questionnaire (NAVQ, Italian version). Nevertheless, the two groups did not differ in the measurement of angular size subtended by the smallest detail of the letters. Overall, our data reveal that non-presbyopes and presbyopes have different visual habits when using a smartphone. These differences should be considered when determining the best near correction.
近年来，智能手机的使用呈爆炸式增长，因此，了解与使用此类设备相关的视觉习惯在整个生命周期中变得越来越重要。在本研究中，我们测量了一组非远视者（n=157）和一组远视者（n=60）在阅读智能手机上的简单短信时的阅读距离和字符大小。结果表明，与远视者相比，非远视者使用的阅读距离更短，这种行为导致更高的调节需求。远视者还使用更大的字符大小，并且这种行为在近视力出现困难时更为明显，如近视力活动视觉问卷（NAVQ，意大利语版本）中所示。然而，两组在测量字母最小细节所包含的角度大小方面没有差异。总的来说，我们的数据显示，非远视者和远视者在使用智能手机时有不同的视觉习惯。在确定最佳近距矫正时，应考虑这些差异。
