视频终端尺寸对儿童视疲劳的影响

目的 探讨视频终端尺寸对儿童视疲劳的影响。方法 选取儿童30名为研究对象，年龄8～13岁，所有受检者在相同条件下，每人均通过手机、平板和电视3种视频终端观看2节20 min的课程视频，比较观看后的视力、瞬目次数及Schirmer试验数据。结果 (1)观看课程视频后，3种终端双眼视力较测前(右眼5.00±0.00,左眼5.00±0.00)均有所下降(P<0.05),手机组(右眼4.90±0.05,左眼4.86±0.07)低于电视组(右眼4.98±0.02,左眼4.94±0.05),差异有统计学意义(P<0.05)。(2)观看视频35 min时，各组瞬目次数较基础值(12.10±0.88)显著增加，其中手机组(22.80±1.48)高于平板组(19.70±2.06)和电视组(17.10±1.52),差异有统计学意义(P<0.05)。(3) Schirmer试验显示，观看视频后，各组双眼泪液分泌量较基础[右眼(12.30±1.06)mm,左眼(12.30±1.49)mm]明显增加，其中手机组[右眼(20.40±1.84)mm,左眼(20.70±2.45) mm]多于平板组[...

Effect of vision-display-terminal size on visual fatigue of school-age children

Objective To investigate the differences of visual fatigue caused by different visual-display-terminal size on school-age children.Methods Thirty school-age children were selected as the study subjects. Each one watched 2 sessions of 20 minutes course videos with mobile phone, tablet and television under the same condition. The visual acuity, the count of scardamyxis and the Schirmer test data after watching were recorded.Results After the courses, the vision acuity decreased compared with the pre-test data(OD 5.00±0.00,OS 5.00±0.00), and the mobile phone group data(OD 4.90±0.05,OS 4.86±0.07) were lower than the TV group(OD 4.98±0.02,OS 4.94±0.05), and the difference was statistically significant (P<0.05). In the later stage of the test, the count of scardamysis in each group increased significantly compared with the basic level(12.10±0.88). The number of mobile phone group(22.80±1.48) was higher than the tablet(19.70±2.06) and TV groups(17.10±1.52). The difference was statistically significant (P<0.05). In the Schirmer test after the course, the secretion of tear compared with the basics [OD(12.30±1.06)mm,OS(12.30±1.49)mm] in each group increased significantly. The data of mobile phone group [OD(20.40±1.84)mm,OS(20.70±2.45)mm] was higher than the tablet [OD(17.40±1.17)mm,OS(17.70±2.00)mm] and TV group [OD(15.30±0.82)mm,OS(15.60±1.58)mm]. The difference was statistically significant (P<0.05).Conclusions School-age children will be faced with more visual fatigue from smaller visual terminal screens than large ones.