Abstract:AIM: To investigate whether under-correction and full correction affect the refractive changes and vision improvement of children with high hyperopia and amblyopia.
METHODS: A total of 49 children(98 eyes)with high hyperopia and amblyopia who received amblyopia treatment for 3a or more in Suining Central Hospital from 2015 to 2019 were collected. According to the differences between the prescription of optician and the results of cycloplegic refractions, the patients were divided into two groups: under correction group 29 cases with 58 eyes(the difference of spherical power ≥1.5D)and full correction group 20 cases with 40 eyes(the difference of spherical power ≤0.25D). Then, repeated measurement analysis of variance method was used to analyze the changes of refractive error and vision of the two groups of children during 3a of treatment.
RESULTS:There was no statistical difference in age, diopter and corrected vision between the two groups at the beginning of diagnosis(P>0.05). The diopter of the two groups decreased gradually during the treatment, and the diopter of the children in the under correction group decreased significantly higher than that in the full correction group(Ftime=500.299, Ptime<0.01, Fgroup=6.949, Pgroup=0.010). The reduction of hyperopia in the under correction group was 1.215±0.262D, and 0.612±0.211D in the full correction group. The hyperopia reduction was significantly higher in the under correction group(t=-12.068, P<0.01). The corrected visual acuity of the two groups increased with the prolongation of treatment time. The improvement of visual acuity in the under correction group was significantly better than that in the full correction group(Ftime=1138.526, Ptime<0.01, Fgroup=14.206, Pgroup<0.01).
CONCLUSION: The hyperopia reduction and vision improvement of children with under correction were better than that with full correction. Suitably under correction of hyperopia can better promote the eye growth and vision improvement of children with high hyperopia and amblyopia.
