Department of Ophthalmology, Shaare Zedek Medical Center, Jerusalem, Israel; Affiliated with the Hebrew University of Jerusalem; and.
iSEARCH, Innovation Shaarezedek Eye Advanced Research Center Hub, Jerusalem, Israel.
Cornea. 2021 Oct 1;40(10):1309-1315. doi: 10.1097/ICO.0000000000002656.
To evaluate the impact of a prolonged reading session on a smartphone screen on optical quality metrics and tear film stability.
This prospective study was conducted in 41 healthy volunteers who were asked to read an article on a smartphone screen for 20 minutes. The following tests were performed before the reading task in this consecutive order and repeated after the reading task in the same order: automated noninvasive tear break-up time, optical quality assessment including Objective Scatter Index (OSI), modulation transfer function, Strehl ratio, and tear film dynamic analysis as follows: vision break-up time (VBUT) as a function of OSI changes within 20 seconds, using a double-pass aberrometer imaging system, and fluorescein tear break-up time (FBUT) measured using the slit lamp.
All break-up time-related parameters (noninvasive tear break-up time, FBUT and VBUT) were significantly reduced after the reading task (P < 0.01). The OSI was significantly worsened after the reading task (P = 0.01), whereas all the other optical quality metrics (modulation transfer function and Strehl ratio) slightly deteriorated, were not statistically significant. A significant correlation was found between the shortening of the FBUT, VBUT, and the worsening of the OSI (r = -0.33, P < 0.05).
A reading session on a smartphone screen in healthy subjects was found to significantly affect the tear film stability and objectively worsen the retinal image quality.
评估在智能手机屏幕上长时间阅读对光学质量指标和泪膜稳定性的影响。
本前瞻性研究纳入了 41 名健康志愿者，要求他们在智能手机屏幕上阅读文章 20 分钟。在阅读任务之前，按照以下顺序进行了以下测试，并在阅读任务后按照相同的顺序重复了这些测试：自动非侵入性泪膜破裂时间、包括客观散射指数（OSI）在内的光学质量评估、调制传递函数、斯特列尔比和泪膜动态分析，如下所示：在 20 秒内 OSI 变化的视觉破裂时间（VBUT），使用双通像差仪成像系统，以及使用裂隙灯测量的荧光素泪膜破裂时间（FBUT）。
所有与破裂时间相关的参数（非侵入性泪膜破裂时间、FBUT 和 VBUT）在阅读任务后均显著降低（P<0.01）。OSI 在阅读任务后显著恶化（P=0.01），而其他所有光学质量指标（调制传递函数和斯特列尔比）略有恶化，但无统计学意义。FBUT、VBUT 缩短与 OSI 恶化之间存在显著相关性（r=-0.33，P<0.05）。
在健康受试者中，在智能手机屏幕上阅读会显著影响泪膜稳定性，并客观地恶化视网膜图像质量。
