Correlation Of Eye Movement Parameters And Refraction Status In Children At The Age Of 7-15

Objective: To investigate the correlation between the eye movement parameters(EMPs) and refractive satatus in children at the age of 7-15, and to improve the prevention and treatment of the juvenile myopia.Methods: A total of 2 096 children were enrolled and divided into myopia group(≦-0.50D), emmetropia group(+0.25--0.25D) and hypermetropia group(≥+0.50D). Furthermore, the patient in myopia group were divided into high myopia(≤-4.25D), moderate myopia(-2.25--4.00D)and low myopia(-0.50--2.00D) group. All children were examined with retinoscopy Retinoscopy was performed following after cycloplegia with tropicamide(0.5%). The EMPs including AC/A ratio, accommodative lag,phoria at near, phoria at distance were identified with the phoropter. The correlations between EMPs and refraction status were analyzed, and the differences of the refraction status and EMPs in different age groups were identified.Results: AC/A ratio and accommodative lag in myopia group werehigher than those in emmetropia and hypermetropia group(3.690±0.057,2.450±0.331, 0.782±0.221, p<0.001; 2.648±0.060, 2.529±0.089,0.555±0.065, p<0.001). AC/A ratio in high myopia group was higher than those in low myopia group(3.558±0.141, 3.236±0.072, p<0.001). The myopia degrees of refraction were positively correlated with AC/A ratios and age(r=0.146, p<0.001; r=0.053, p=0.016). The age had no significant correlations with AC/A ratio(r=0.053, p=0.056), phoria at distance(r=-0.020, p=0.363), phoria at near(r=-0.011, p=0.619) and the accommodative lag(r=0.071, p=0.303).Conclusion The children myopia may increase with more accommodative lag and high AC/A ratios, and there is an increasing tendency of the AC/A ratios which is consistent with the more severe myopia degree.