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KMID : 1159320130150010053
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Korean Journal of Vision Science
2013 Volume.15 No. 1 p.53 ~ p.64
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A Study on Changes in Ocular Components After Wearing Reverse Geometry Lenses
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Yoon Min-Hwa
Park Hyun-Joo
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Abstract
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Purpose : To investigate changes in ocular components after wearing reverse geometry lenses. Method : We aimed to verify the statistical significance of inhibitive effects against the progression of myopia, based on medical records regarding changes in the uncorrected visual acuities, pupil diameters, central corneal thicknesses, anterior chamber depths, vase curves of the average K- readings and corrected visual acuities of a total of twenty-seven (fifty-four eyes) children and teenagers between the ages of seven and fifteen, and of visions between -1.00D and -6.50 D: before wearing reverse geometry lenses, after three to six months of use, at seven to twelve months of use, at thirteen to twenty-four months of use and at twenty-five to thirty-six months of using the lenses. Results: After wearing reverse geometry lenses. The uncorrected visual acuities slowed significant improvement, from 0.33 ±0.19 initially to an increase by 0.33 ±0.19 to 0.97 ±0.14 at three-to-six months to an increase by 0.61 ±0.23 to 0.95 ±0.17 at seven-to-twelve months, to an increase by 0.57 ±0.27 to 0.91 ±0.22 at thirteen-to-twenty-four months, and to an increase by 0.52 ±0.32 to 0.86 ±0.27 at twenty-five-to-thirty-six months of use. Which was 0.33 ±0.19, by 0.63 ±0.22(0.97 ±0.14)at three to six months of use, 0.61 ±0.23 (0.95 ±0.17) at seven to twelve months of use, 0.57 ±0.27 (0.91 ±0.22) at thirteen to twenty-four months of use and 0.52 ±0.32(0.86 ±0.27) at twenty-five to thirty-six months of use. The subjects` average corrected visual acuity remained unchanged through twelve months and then showed statistically significant (P<0.05) change, of 0.19 ±0.50 at thirteen through twenty- four months and 0.30 ±0.62 at twenty-five to thirty-six months. Average K-readings showed statistically significant changes, declining by 1.45 ±0.97 mm at three to six months, 1.40 ±1.12 mm at seven to twelve months, 1.26 ±1.34 mm at thirteen to twenty-four months and 1.08 ±1.54 mm at twenty-five to thirty-six months The participants` central corneal thicknesses declined by 2.21 ±10.70um at three to six months and 1.21 ±12.42um at seven to twelve months, but this was not statistically significant(P>0.05), and they increased by 0.79 ±13.17um and 1.93 ±13.97um at thirteen to twenty-four months and twenty-five to thirty-six months, respectively, but this also failed to show any statistically significant (P=0.30) change. The pupil diameters decreased by 0.18 ±0.64 mm ati three to six months 0.20 ±0.64 mm at seven to twelve months, 0.14 ±0.53 mm at thirteen to twenty-four months and 0.25 ±0.56 mm at twenty-five to thirty-six months, showing significant(P<0.05) change, The subjects` anterior chamber depths decreased with statistical significance (P<0.05) change. The subjects` anterior chamber depths decreased with statistical significance (P<0.05) by 0.66 ±0.08 mm at three to six months and 0.03 ±0.99mm at seven to twelve months, while they decreased by 0.03 ±0.13 mm at thirteen to twenty-four months. Which was not statistically significant ( P=0.14). and decreased by 0.05 ±0.14mm at twenty-five to thirty-six months. A statistically significant(p<0.05)change, Conclusion: Over the course of thirty-six months in which the subjects wore reverse geometry lenses, unaided visual acuities were improved, changes in refractive error were insignificant, and significant changes were observed in corneal base curves, pupil diameters and anterior chamber depths, etc, in them.
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KEYWORD
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Uncorrected visual acuity, Pupil diameter, Central corneal thickness, Anterior chamber depth, Average K-reading
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