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KMID : 1159320130150010039
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Korean Journal of Vision Science
2013 Volume.15 No. 1 p.39 ~ p.51
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A Comparative on Changes of Refractive Correction Value by Degree of Myopia and Use of the Reverse Geometry Lens, Myopia Control Lens and Single Vision Lens
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Yoon Min-Hwa
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Abstract
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Puroise: To learn the changes of refractive correction nalue regarding effects of inhibiting myopia progression after wearing the reverse geometry lens, myopia control lens and single vision lens, by degree of myopia, in relation to those after wearing the single vision leds, Method: Children bwtween the ages of seven and fifteen were organized into three groups according to their degree of myopia and were given fifty-seven reverse geometry lenses, fifty-six MClenses and seventy-eight single vision lenses to wear. Group 1 consisted of myopic eyes S-2.00D and below, Group 2 consisted of myopic eyes between S-2.25D and S-44.00D, while Group 3consisted of myooic eyes S-4.25D and above, We attermpted to learn the inhibitive effects against myopis progression attained by condition changes in refractive correction value at twelve months and under, thirteen to twenty-four months and twenty-five to thirty-six months, and to verify the statistical significance of the results thus pursued. Results: By degree of myopia and at thirty-xis months, Group 1users of the reverse geometry lens showed an increase in nisual acuitu of S-0.11 ±0.32D(P>0.05), but this was not statistically significant while users of the MC lens and single vision lens in the same group had statistically significant (P<0.05) increases in visualacuity of S-1.06 ±0.68D (P<0.05) and S-1.95v1.07D, respectively. At thirty-six months inGroup 2. users of the reverse geometric lens had an increase in visual acuitl of S-0.45 ±0.78D. but this was statistically insignificant (P>0.05) while users of the MC and single vision ledses showed staristically significant(P<0.05) increases of S-1.06 ±0.68D(P<0.05) and S-1.95 ±1.07D, respectively . At thirty-six months in group 3. wearers of the reverse geometric lens andsingle vision ledns had statistically significant (P<0.05)changes of S-1.02v0.42D and S-1.77 ±0.74d, RESPECTIVELY.Conclusion: Regarding condition changes in refractive correction value by degree of myopia from advanced to early in stage, wearers of the reverse geometry ledns had low increases in chage, a sign myopia progression was inhibited, and the MC lens was less effective than the reverse geometric lens while more effective than the single vision lens in inhubiting the progression of myopia, and it was discovered to have the greatest effect of inhibiting the progression of myopia in myopic eyes of S-2.00D and below.
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KEYWORD
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MC lens, single vision lens, reverse geometry lens, inhibition of myopia progression
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