Lin Chia-Chen, Hung Jia-Horung, Huang Yi-Hsun
Department of Ophthalmology, College of Medicine, National Cheng Kung University Hospital, National Cheng Kung University, Tainan, Taiwan.
Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Front Med (Lausanne). 2022 Apr 4;9:848794. doi: 10.3389/fmed.2022.848794. eCollection 2022.
Computer vision syndrome (CVS) is one of the most frequently encountered problems among video display terminals (VDT) users, but little is known regarding the short-term effect after exposure to light-emitting diodes (LED). The purpose of this study was to determine if short-term exposure to LED leads to changes in corrected distance visual acuity (CDVA), lipid layer thickness (LLT), blink rates, partial blink ratio, and computer vision syndrome questionnaire (CVS-Q) score.
Prospective, cross-sectional study.
In this study, participants were recruited at the National Cheng-Kung University Hospital, a tertiary referral center in southern Taiwan, for examination. Participants were asked to complete the CVS-Q and undergo a series of ocular examinations, including CDVA, LLT, blink rates and partial blink ratio before and after watching an LED display for 15 min. Main Outcome Measures were changes in CDVA, LLT, blink rates, partial blink ratio, and CVS-Q measurements.
In total, 120 eyes from 60 participants (mean age: 35.7 ± 9.4 years) were included; 31 participants were men (51.7%), and 29 were women (48.3%). The CDVA, LLT, blink rates, and partial blink ratio did not change after watching the LED display. The CVS-Q score significantly improved after short-term LED exposure ( < 0.001). A subgroup analysis of subjects with a baseline LLT of <60 nm or ≥60 nm determined that LLT significantly decreased in individuals with a baseline LLT of ≥60 nm ( = 0.016).
Short-term use of LED displays reduced LLT in individuals with a baseline LLT of ≥60 nm, despite the visual symptoms of CVS improved subjectively. Therefore, digital device users should be aware of the potential negative effects of LED exposure on the eyes.
计算机视觉综合征（CVS）是视频显示终端（VDT）用户中最常遇到的问题之一，但对于暴露于发光二极管（LED）后的短期影响知之甚少。本研究的目的是确定短期暴露于LED是否会导致矫正远视力（CDVA）、脂质层厚度（LLT）、眨眼率、部分眨眼比率和计算机视觉综合征问卷（CVS-Q）评分发生变化。
前瞻性横断面研究。
在台湾南部的三级转诊中心国立成功大学医院招募参与者进行检查。参与者被要求完成CVS-Q问卷，并在观看LED显示屏15分钟前后接受一系列眼部检查，包括CDVA、LLT、眨眼率和部分眨眼比率。主要观察指标为CDVA、LLT、眨眼率、部分眨眼比率和CVS-Q测量值的变化。
共纳入60名参与者的120只眼睛（平均年龄：35.7±9.4岁）；31名参与者为男性（51.7%），29名参与者为女性（48.3%）。观看LED显示屏后，CDVA、LLT、眨眼率和部分眨眼比率没有变化。短期LED暴露后，CVS-Q评分显著改善（<0.001）。对基线LLT<60nm或≥60nm的受试者进行亚组分析，结果显示基线LLT≥60nm的个体LLT显著降低（=0.016）。
尽管CVS的视觉症状在主观上有所改善，但短期使用LED显示屏会使基线LLT≥60nm的个体的LLT降低。因此，数字设备用户应意识到LED暴露对眼睛的潜在负面影响。
