正视眼与近视眼阅读简体字与繁体字的调节微波动差异研究

Effect of simplified and traditional Chinese character on accommodative microfluctuation in young adult myopes and emmetropes

目的 探讨正视眼与近视眼阅读简体字与繁体字的调节微波动差异.方法 前瞻性队列研究.招募平均年龄（23.9±1.8）岁受试者36名,其中近视眼18名,等效球镜度数（-3.74±1.22）D,正视眼18名,等效球镜度数（-0.14±0.22）D.于40 cm外阅读液晶屏幕呈现的两种大小（8、12磅）、两种字体（简体字与繁体字）组成的4组视标共135 s,应用近红外开放视野自动验光仪连续测量受试者阅读视标时的调节反应并计算调节微波动.对调节微波动量的变化进行配对t检验.结果 近视组受试者阅读繁体字和简体字的调节微波动量分别为（0.35±0.17）和（0.29±0.11）D,差异有统计学意义（t=2.514,P=0.017）;正视组受试者阅读繁体字和简体字调节微波动量分别为（0.24±0.11）和（0.24±0.12）,差异无统计学意义（t=0.04,P=0.996）.近视组受试者阅读繁体字的调节微波动量大于正视组,差异有统计学意义（t=3.140,P=0.02）,近视组与正视组阅读简体字的调节微波动量差异无统计学意义（t=1.866,P=0.066）.结论 在阅读过程中,近视眼在调节微波动方面较正视眼更容易受到高空间频率字体的影响.

Objective This study investigates the effect of simplified and traditional Chinese character on accommodative microfluctuation in young adult myopes and emmetropes.Methods Prospective cohort study.Based on refractive errors,Young adult candidates （18-28 years） were classified into two groups based on their spherical equivalent degrees：emmetropes （n=18）,myopes （n=18）.Four different reading targets （12pt size simplified and traditional Chinese characters,and 8pt size simplified and traditional Chinese characters） were displayed on computer screen collectively for 135s.The accommodative microfluctuation of the candidates were measured using the free space Grand-Seiko WAM-5500 autorefractor.Results The results indicated that the type of character （simplified and traditional） had significant influence on accommodative microfluctuation.For myopic candidates,the accommodative microfluctuation for traditional Chinese character was greater than that for simplified Chinese character [traditional Chinese character：（0.35±0.17） D,vs.simplified Chinese character：（0.29±0.11） D,t=2.556,P=0.017],however as for emmetropic candidates,the difference between the accommodative microflucuation for the two types of characters was of no statistical significance [traditional Chinese character：（0.24±0.11） D,vs.simplified Chinese character：（0.24±0.12） D,t=0.004,P=0.996].There was a difference between emmetropic and myopic candidates in terms of accommodative microfluctuation for traditional Chinese character,myopes had greater accommodative microfluctuation than emmetropes （t=3.140,P=0.02）.However the difference between emmetropic and myopic candidates in terms of accommodative microfluctuation for simplified Chinese character was of no statistical significance （t=1.866,P=0.066）.Conclusions The results of the study indicated that myopes were more susceptible than emmetropic in accommodative microfluctuation when reading traditional Chinese character of high spatial frequency.