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KMID : 1159320170190020167
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Korean Journal of Vision Science
2017 Volume.19 No. 2 p.167 ~ p.177
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Visual Quality According to Refractive Correction Methods
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Kim Hui-June
Lee Koon-Ja
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Abstract
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Purpose: To evaluate the visual quality according to myopic correction methods using a double-pass system.
Method: We retrospectively analyzed 159 subjects who underwent correction of myopia through non-surgical methods (spectacle group 44 subjects, contact lens group 42 subjects) and surgical methods (Femtosecond laser LASIK group 43 subjects, implantable contact lens (ICL) group 30 subjects). Modulation transfer function (MTF), Strehl ratio, objective scattering index (OSI), and OQAS (Optical Quality Analysis System) values (OVs) were assessed with an OQAS. In the surgical groups, all measurements were evaluated 1 month after surgery in which the visual acuity was stable.
Result: Subjective visual acuity and Stehl ratio were not different among the spectacle, contact lens, LASIK surgery, and ICL groups(p=0.072, p=0.358, respectively). MTF (cycles/degree) were 41.99 ± 7.99, 36.49 ± 6.36, 41.67 ± 9.99, 31.23 ± 8.85 and OSI were 0.53 ± 0.39, 0.53 ± 0.20, 0.45 ± 0.19, 0.76 ± 0.37 in the spectacle, contact lens, LASIK surgery, and ICL groups, respectively, and those were significantly different(p=0.000), (p=0.000). OV100%, OV20% and OV9% were significantly different(p=0.000), (p=0.000), (p=0.000) in the spectacle, contact lens, LASIK surgery, and ICL groups and those were best in the spectacle and LASIK groups.
Conclusions: The subjective visual acuity is not different according to refractive correction methods in myopes, however, MTF, OSI and OVs are best in spectacle and femtosecond LASIK group and worst in ICL group.
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KEYWORD
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Spectacle lenses, Contact lens, Femtosecond laser LASIK, Implantable contact lens, Double-pass technique, Visual quality
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