低中度近视人群优势眼和高阶像差的关系

目的研究低中度近视人群优势眼和非优势眼的高阶像差，明确两者在视网膜上像质的差异。方法对74例无斜视、弱视、手术外伤史等其他眼病，无全身疾病者，在医学验光基础上结合卡洞法判别优势眼，使用iTrace视功能分析仪比较优势眼和非优势眼6mm瞳孔直径全眼和角膜的高阶像差。结果优势眼和非优势眼全眼RMSh（t=-5．029，P=0．000）、RMS3（t=-4．608，P=0．000）、球差（t=-2．372，P=0．020）和彗差（t=-5．387，P=0．000），差异均有统计学意义，RMS4（t=-1．891，P=0．063）差异无统计学意义。两者角膜RMSh（t=-2．206，P=0．031），差异有统计学意义，RMS3（t=-1．400，P=0．166）、RMS4（t=-1．692，P=0．095）、球差（t=-1．267，P=0．209）和彗差（t=-1．112，P=0．27），差异均无统计学意义。结论在低中度近视人群中，优势眼的高阶像差优于非优势眼，且这种差异主要来自于晶状体等眼内组织，导致优势眼的视网膜像质优于非优势眼，有利于优势眼别的选择和稳固。

Relationship between ocular high-order aberrations and dominant eyes in low and moderate myopia

Objective The visual pathway of dominant eye show a higher excitatory response to external stimulation than that of non-dominant eye in the level of cerebral cortex. Whether this difference is associated with the receive of visual signal in retina is unclear. Present study was to compare the ocular high-order aberrations between dominant eye and non-dominant eye in low and moderate myopic eyes and investigate the difference of the imaging quality of retina. Methods Seventy-four volunteers were enrolled in this study. The dominant eyes of subjects were determined by using simplified hole-in-the-hole method, and the high-order aberrations of whole eye and cornea under 6 mm pupil diameter were analysed using Trace Visual Function Analyser. Results The total high-order aberrations （t = -5.029,P =0.000）,root mean square （RMS） of the 3rd aberrations （t = -4.608,P=0.000）,spherical aberration （t = -2.372,P =0.020） and coma （t = -5.387,P =0. 000）of whole eye were significantly different between dominant eyes and non-dominant eyes, but no significant difference was found in RMS of the 4th aberrations between dominant eyes and non-dominant eyes （t = - 1. 891 ,P = 0. 063 ）. The total high-order aberrations of cornea showed a significant difference between dominant eyes and non-dominant eyes （t = -2.206, P = 0.031 ）. There were no significant differences in RMSh of the 3rd aberrations （t = -1. 400, P = 0. 166） , RMSh of the 4th aberrations （t = -1. 692 ,P = 0.095）,spherical aberration （t= - 1.267,P =0.209） and coma （t = - 1.112,P =0.27） between dominant eyes and non- dominant eyes. Conclusion In low and moderate myopic eyes, ocular high-order aberrations of dominant eye are better than those of non-dominant eye, and coma difference is mainly from lens. The imaging quality of retina in dominant eye is better than that of non-dominant eye,which might affect the choice of dominant eye.