计算机阅读后的调节幅度与屈光度优势眼的关系

目的 研究计算机阅读后的单眼调节幅度及其变化与屈光度、优势眼的关系.方法 30名受试者按不同屈光度、屈光参差状态、优势眼分组,均作连续计算机终端阅读2h,阅读前后分别查单眼调节幅度.结果 (1)连续2h计算机阅读前,调节幅度的大小与屈光度有相关性(r=0.439,P=0.003);阅读后,调节幅度的变化与屈光度无相关性(r=0.121,P=0.434).(2)计算机终端阅读前,优势眼的调节幅度大小与非优势眼调节幅度大小比较差异无统计学意义(P＞0.05);阅读后,优势眼的调节幅度变化比非优势眼调节幅度变化大(P＜0.05).(3)生理性屈光参差组和病理性屈光参差组两组内优势眼眼别与双眼中屈光不正度数较高或较低眼别之间无相关性(P＞0.05).结论 计算机阅读前,调节幅度的大小与屈光度有相关性;计算机阅读后优势眼的调节幅度变化比非优势眼调节幅度变化大;优势眼眼别与双眼中屈光不正度数较高或较低眼别之间无相关.高调节幅度及优势眼可能并不是近视进展中的主要因素.

The relationship between amplitude of accommodation and the diopter of dominant eye for computer terminal reader

Objective To study the relationship between amplitude of accommodation (AMP) and the diopter of dominant eye for computer terminal reader. Methods Thirty volunteers were divided into three groups according to degree of anisometropia, diopter and the dominant eye. They all underwent 2-hour continuous computer-based reading. On the same day before and after reading, AMP was measured. Results Before 2-hour continuous computer-based reading, positive correlations (r =0.439, P =0.003) were observed between AMP and diopters of myopia reftaction. However, after reading, no statistic significant correlation was observed between the change of AMP and refractive diopters (r=0.121, P=0.434). Before 2-hour continuous computer-based reading, no statistic significant correlation was observed on AMP between the dominant eye and the non-dominant eye (P ＞0.05). After reading, the change of AMP was higher in the dominant eye (P ＜0.05). No statistic significant correlation was observed between the dominant eye and the eye with higher or lower myopia fiom the physiological anisometropia group and the pathological anisometropia group (P ＞0.05). Conclusions Positive correlations are found between AMP and myopia diopters. The change of AMP is obvious in the dominant eye. High AMP and the dominant eye may not play main roles in myopia onset.