近视性屈光参差者调节参数的研究

Study on Accommodative Parameters of Anisometropes

目的分析近视性屈光参差者双眼的调节参数和正视者是否有差异，探讨这些调节参数的差异是否是导致个体屈光状态近视化发展的诱因。方法选取40位受试者，正视者右眼20只，屈光参差者20位，其中屈光参差者高度数眼20只，屈光参差者低度数眼20只，在屈光完全矫正的基础上用主观的测量方法测量其调节幅度、正负相对调节和调节滞后量。结果三组间的最大调节幅度AMP以及负相对调节NRA无显著性差异，正视组的正相对调节PRA为（-5．462±1．2651）D，屈光参差组的PRA为（-3．350±1．7404）D。近视性屈光参差组PRA结果明显低于正视组（P=0．026）。正视眼的主观调节滞后量为（0．2375±0．2218）D，屈光参差的高度数眼滞后量为（1．2875±0．4389）D，而屈光参差的低度数眼的调节滞后量为（0．2250±0．2913）D。对于屈光参差者，两眼间调节滞后量值差异明显，且有高度统计学意义（t=9．519，P〈0．0001），高度数眼的调节滞后远远大于低度数眼的调节滞后。结论屈光参差者的高度数眼表现出更多的主觉调节滞后量，近视的发生与该眼有更大的调节调节滞后相关。

Objective To analyze the accommodative parameters between anisometropes and emmetrope and to see if the accommodation parameters are the risk factor for myope progression. Methods Fourty subjects,20 anisometrope and 20 emmetrope, the AMP accommodation lag and NRA/PRA were measured after the distance refractive correction. Results There were no significant differences in AMP and NRA between three groups. The PRA of emmetrope was （-5.462± 1.2651 ）D,the PRA of anisometrpe was （-3. 350± 1.7404）D. The PRA in anisometrope was significantly lower than that ofemmetrope （P = 0.026）. The accommodation lag of emmetrope was （0.2375± 0.2218 ）D, The accommodation lag of high myope eye of anisometrope was （1.2875± 0.4389 ）D , The accommodation lag of low myope eye of anisometrope was （0.2250± 0.2913）D. The accommodation lag in high myope eye of anisometrope was significantly higher than that of low myope eye （ t =9.519, P 〈 0.0001 ）. Conclusions The high myope eye had the higher accommodation lag. The myope may need higher accommodation stimulus to reach the demand,