Comparison of the accommodative response with two refractive corrections for myopic teenagers / 国际眼科杂志(Guoji Yanke Zazhi)

ABSTRACT

@#AIM: To observe and compare the accommodative responses of myopic teenagers with orthokeratology lenses and frame glasses.<p>METHODS: One hundred and twenty myopic teenagers(240 eyes)aged 10-16y were selected and divided into experimemtal group(orthokeratology lens group)and control group(frame glasses group), with 60 cases(120 eyes)in each group. The accommodative response before and after correction of all the cases in the two groups were followed up and compared after 1, 3, 6 and 12mo.<p>RESULTS: A total of 113 patients(226 eyes)completed the experiment, including 54 patients(108 eyes)in the experimental group and 59 patients(118 eyes)in the control group. Both the two groups showed accommodative lag which gradually decreased with the wearing time. The accommodative lag before and after correction in the experimental group and control group were respectively(1.22±0.47, 0.91±0.39, 0.77±0.40, 0.65±0.32, 0.51±0.22),(1.23±0.48, 1.05±0.41, 0.90±0.49, 0.83±0.46, 0.69±0.33)D. The effects of measurement time on accommodative lag of each group were significant(<i>F</i>=195.229, 142.361, 323.484, <i>P</i><0.05). The interaction between the group and the measurement time also had significant effects(<i>F</i>=11.222,<i>P</i><0.05). But the interaction between eye and measurement time had no significant effects(<i>F</i>=0.025,0.023,<i>P</i>>0.05).The accommodative lags in the orthokeratology group were smaller than the frame glasses group after correction(<i>t</i>=-2.587, -2.241, -3.522, -4.587, <i>P</i><0.05),but no significant difference before correction(<i>t</i>=-0.07,<i>P</i>>0.05).<p>CONCLUSION: Both frame glasses and orthokeratology can improve accommodative response and reduce accommodation lag of juvenile myopia, but the effect of wearing orthokeratology is superior to frame glasses.