摘要
目的研究使用计算机终端及不同的休息方案对调节、聚散功能的影响。方法30名受试者均接受5种不同阅读方案：（1）连续计算机终端阅读2h后休息10min。（2）连续书本阅读2h后休息10min。（3）连续计算机终端阅读1h后休息10min（休息1方案）。（4）计算机终端阅读总时间1h，每30min间隔休息5min（休息2方案）。（5）计算机终端阅读总时间1h，每15min间隔休息2min（休息3方案）。每次阅读前后分别查眼部屈光、调节反应（调节滞后度）、单眼调节幅度、聚散功能（集合近点、调节性集合／调节[accommodative convergence/accommodation, AC/A]、远近距水平隐斜、远近距融像性水平聚散力）。结果（1）连续2h计算机终端阅读后较书本阅读更易出现调节滞后值增加、调节幅度下降、集合近点远移、近距水平外隐斜增加内隐斜减小、近距融像性水平聚合力减弱（P〈0．05）。（2）连续计算机终端阅读2h较1h更易出现调节滞后值增加、调节幅度下降、集合近点远移（P〈0．05）。（3）调节滞后值、调节幅度、集合近点、近距离水平内外隐斜在三种休息方案之间的差异具有统计学意义（P〈0．05），休息3方案优于其它方案。结论使用计算机终端阅读较书本阅读更易对调节、聚散功能产生影响，且随时间的不同出现差异。三种不同休息方案比较，每使用计算机终端阅读15min间隔休息2min对调节、聚散功能影响最小。
Objective To evaluate the effects of work-rest schedules on accommodation, vergence for computer terminal reader.Methods Thirty participants underwent 5 reading assignments ： （ 1 ） 2-hour continuous computer-based reading, followed by 10 minutes rest; （2） 2-hour continuous book-based reading, followed by 10 minutes rest; （3） 1 hour continuous computer-based reading followed by 10 minutes rest （work-rest schedule 1, WS1 ）; （4） 1-hour computer-based reading with a 5-min break in every 30 mins （ WS2 ） ; （ 5 ） 1-hour computer-based reading with a 2-min break in every 15 mins （ WS3 ）.On the same day before and after assignment, non-Cycloplegic refraction, lag of accommodation （LA）, accommodation amplitude （AA）, and vergenee （including near point of convergence [NPC], horizontal phoria [HP] at near [HP-N] and far [HP-F] distance, and horizontal fusional vergence [HFV] at near and far distance, accommodative convergence/ accommodation [AC/A]） were measured.Results People with reading assignment 1 were more likely to have increased LA, NPC, horizontal exophoria at near distance （HP-N exo）, and decreased AA, horizontal esophoria at near distance （HP-N eso）, horizonta fusional convergence at near distance （HFC-N） than did people with reading assignment 2 （P〈0.05）.These changes but HP and HFC-N were more profound in people with assignment 1 than in people with assignment 3 （WS1） （all with P〈0.05 ）.These changes but HFCN were seen in people with WS1/WS2 than in people with WS3 （all with P〈0.05）.Conelnsions Computer-based reading is more likely to affect accommodation and vergence than book-based reading.The impacts increase with longer reading time.Compared with WS1 and WS2, WS3 is the optimal reading schedule with least impact on accommodation and vergence.
出处
《中国实用眼科杂志》
CSCD
北大核心
2010年第4期351-355,共5页
Chinese Journal of Practical Ophthalmology
关键词
计算机终端
休息方案
调节
聚散功能
Computer terminal
Work-rest schedule
Accommodation
Vergence
