口香糖预防视疲劳的效果。
The Effects of Chewing Gum in Preventing Eyestrain.
机构信息
Department of Orthoptics and Visual Science, School of Allied Health Sciences, Kitasato University, Kanagawa, Japan.
LOTTE Co., Ltd, Central Laboratory, Saitama, Japan.
出版信息
Biomed Res Int. 2020 Nov 12;2020:2470473. doi: 10.1155/2020/2470473. eCollection 2020.
PURPOSE
To investigate the effects of chewing gum and tablet candy to reduce eyestrain in healthy individuals.
MATERIALS AND METHODS
A double-blinded crossover trial was conducted. Forty-six healthy individuals (23 men, 23 women) between 20 and 59 years old, feeling eyestrain, were enrolled. Each 10-year age group included 12 individuals except the 30s group, which included 10 individuals. A visual task was performed on reading material displayed on a computer screen at a fixed distance for 60 min. Gum or tablet candy of two pieces were chewed for two 15-min periods starting 15 and 45 min after starting to read. Subjects chewed gum on Day 1 and tablet candy on Day 2, and vice versa. Primary outcome is as follows: subjective eye fatigue (eye tiredness, eye heaviness, blurred vision, double vision, and eye dryness) using a visual analog scale (VAS). Secondary outcomes are as follows: subjective accommodation from near and far points of accommodation measured with a D'ACOMO, spherical equivalent refraction, and eye dryness by analyzing ring break-up time (RBUT) measured with the RT-7000 Auto Ref-Topographer.
RESULTS
The VAS scores of subjective eye fatigue were not significantly changed between chewing gum and tablet candy ( = 0.397 - = 0.909). Those scores of eye tiredness and eye heaviness were significantly longer before and after the visual task with tablet candy ( = 0.013 and = 0.025, respectively) but not with chewing gum. The changes of subjective accommodation were significantly lower after the visual task between chewing gum and candy ( = 0.043). There were significant differences among each age group (20 s vs. 30 s, = 0.594; 20 s vs. 40 s, = 0.002; 20 s vs. 50 s, = 0.002). After reading, the changes of spherical equivalent refraction did not indicate a shift toward myopia ( = 0.267). In the RBUT, there were no significant differences between the samples ( = 0.680).
CONCLUSIONS
Chewing gum helps improve the ability of the eye to focus, especially in young adults.
目的
研究咀嚼口香糖和含服糖片对减轻健康人群视疲劳的效果。
材料与方法
本研究采用双盲交叉试验。共招募 46 名年龄在 20 至 59 岁之间、自觉眼疲劳的健康个体（男性 23 名，女性 23 名）。除 30 岁组包括 10 名个体外，其余每个 10 岁年龄组各包括 12 名个体。参与者在距离固定的电脑屏幕上阅读材料，阅读 60 分钟。阅读开始后 15 分钟和 45 分钟时，分别咀嚼两片口香糖或糖片，各持续 15 分钟。第一天咀嚼口香糖，第二天咀嚼糖片，以此类推。主要结局指标是视觉模拟量表（VAS）评估的主观眼疲劳（眼疲劳、眼沉重、视力模糊、复视和眼干）。次要结局指标是使用 D'ACOMO 测量的近点和远点调节的主观调节力、球镜等效折射和使用 RT-7000 Auto Ref-Topographer 测量的眨眼反射时间（RBUT）评估的眼干。
结果
咀嚼口香糖和含服糖片后的 VAS 评分的主观眼疲劳无显著差异（ = 0.397， = 0.909）。咀嚼糖片后眼疲劳和眼沉重的评分在视觉任务前后显著延长（ = 0.013 和 = 0.025），但咀嚼口香糖无此变化。视觉任务后咀嚼口香糖和糖片的主观调节力变化差异有统计学意义（ = 0.043）。各年龄组之间存在显著差异（20 岁组与 30 岁组， = 0.594；20 岁组与 40 岁组， = 0.002；20 岁组与 50 岁组， = 0.002）。阅读后，球镜等效折射的变化并未提示近视倾向（ = 0.267）。在 RBUT 中，两组样本之间无显著差异（ = 0.680）。
结论
咀嚼口香糖有助于提高眼睛的聚焦能力，尤其是在年轻成年人中。
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