Analysis of astigmatism and amblyopia in children aged from 3 to 11 years whose visual acuity(VA) is declined

Objective To investigate the type of astigmatism and amblyopia, distribution rule of astigmatism degree ,distribution rule axis of astigmatism , the relationship between two eyes axis of astigmatism , the relationship between axis of astigmatism and amblyopia in children aged 3~11 old.whose visual acuity(VA)is declined. Methods 266 cases 503 eyes of astigmatism in children aged from 3 to 11 years whose visual acuity declined were analysised statistically. Results the ratio of compound hypermetropic astigmatism is predominant,is 71.07%, then compound myopic astigmatism is 11.53%,mixed astigmatism is 8.95%,simple hypermetropia is 5.17%, simple brachymetropia is 3.18%. astigmatism degree 0.50 DC~1.00 DC is 52.18%,1.25 DC~2.00 DC is 30.02%, 2.25 DC ~ 3.00 DC is 10.54%,3.0 DC is 6.76%.The ratio of astigmatism with rule is 94.23%,astigatism against the rule is 2.19%, oblique astigmatism is 3.58%. Symmetrical astigmatism is 95.43%,asymmetrical astigmatism is 4.57%in the binoculus astigmatism .The binoculus astigmatism is 89.46%,monoculus astigmatism is 10.54%. Conclusion The main tyre of astigmatism of children is hypermetropic astigmatism, astigmatism with rule is predominant. Symmetrical astigmatism is predominant in the binoculus astigmatism. There is an association between astigmatism and amblyopia.