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KMID : 1159320120140040341
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Korean Journal of Vision Science
2012 Volume.14 No. 4 p.341 ~ p.351
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Effect of Myopia Control Progressive Addition Lenses on Myopia Progression in Korean Children: A prospective Randamized, Double-Masked Trial
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Kim Dae-Young
Leem Hyun-Sung
Lee Koon-Ja
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Abstract
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Purpose: To evaluate the clinical effectiveness of myopia control progressive addition lenses (PALs) compared with single vision lenses (SVLs) on myopia progression in Korean children. Methods: One hundred six children (ages 6-12 years) with myopia between 0.50D and 4.50D spherical equivalent were recruited. They were randomly assigned (randomized double-masked) to receive either PALs with 1.00D or 1.50D addition or conventional SVLs and were followed for 12 months. The primary outcome measure was progression of myopia, as determined by cycloplegic (1% tropicamide) autorefraction. The secondary outcome measure was change in axial length of the eyes, as assessed by PCI (IOL master). Result: Of the 107 children, 100 children (9.79±1.50 years, 94%) completed the 12 month visit. They were composed of PALs with a 1.00 addition (n=34) or PALs with a 1.50 addition (n=36) or SVLs (n=30). The 12 months difference in progression were -0.43±0.39D in the PAL group and -0.78±0.32D in the SVL group that the difference between the two groups was statistically significant (p < 0.001) with mean difference of 0.35D, however between the two groups in the addition power was no statistically difference (p = 0.940). Mean spherical equivalent increases in the axial length of eyes in the PAL and SVL groups, respectively, were 0.11±0.02 mm and 0.24±0.01 mm, with a statistically significant 12 month mean difference of 0.13 mm (p < 0.001), however between the two groups in the addition power was no statistically difference (p = 0.617). Mean changes in axial length correlated with those in refractive error (r = -0.76 for PAL and r = -0.56 for SVL). Conclusion: This results suggest that myope children may have an additional benefit of slowed progression of myopia.
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KEYWORD
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Myopia control progressive lens, Myopia Progression, Axial length, Children
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