混合散光儿童戴镜与否对调节影响的对比研究

Comparison between accommodative responses at 33cm of children with mixed astigmatism wearing full corrective spectacles or notAbstract Objective

ObjectiveTo investigate the changes in accommodative responses at 33 cm of children with mixed astigmatism with and without wearing full corrective spectacles. MethodsThe right eyes of 54 5-7 year old children with mixed astigmatism were investigated in this cross-sectional study. They were given full corrective spectacles according to the results of optometric testing using 1% atropine eye ointment. An infrared autorefractor （Shin-Nippon Ophthalmic Instruments） was used to measure the accommodative responses of children with and without wearing full corrective spectacles at 33 cm （reading distance）. A paired t test was used for analysis. ResultsThe results demonstrated that with glasses or unaided vision the accommodative lag at 33 cm was 0.64±0.67 D and 0.09±0.59 D， respectively， and the difference was statistically significant （t=5.262， P<0.01）. The data were then divided by spherical equivalent refraction （SER） into 3 groups， SER>0.00 D， SER=0.00 D， SER<0.00 D. The respective accommodative lags at 33 cm with or without glasses were 0.52±0.51 D and 0.17±0.53 D （t=2.680， P<0.05）， 0.75±0.57 D and 0.08±0.74 D （t=4.746， P<0.01）， and 0.73±0.96 D and -0.07±0.52 D （t=3.011， P<0.01）. ConclusionThe near accommodative lag might lead to hyperopic retinal blur during near viewing and drive myopia progression.