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KMID : 1037020210100040229
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Medical Lasers; Engineering, Basic Research, and Clinical Application
2021 Volume.10 No. 4 p.229 ~ p.237
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Effectiveness of Overnight Orthokeratology with a New Contact Lens Design in Moderate to High Myopia with Astigmatism
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Park Yu-Li
Kim Hoon
Kang Jae-Ku
Cho Kyong-Jin
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Abstract
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Background and Objectives: To assess the effectiveness of overnight orthokeratology (OK) in myopia using a new contact lens design over a one-month wearing period.
Materials and Methods: Participants were required to have myopia between ?3.00 and ?7.50D and astigmatism ≤ 2.00 D to participate in the study. The participants underwent OK with the White OK lens® (Interojo, Pyungtek, Korea), which has a 6-curve lens design. Participants were assessed at weeks 1, 2, and 4 using slit-lamp bio-microscopy, and tested for refraction, uncorrected distance visual acuity, and corneal topography. Success was defined as achieving a Logarithm of the Minimum Angle of Resolution (logMAR) ≤ 0.1.
Results: A total of 46 eligible subjects with a mean age of 23.11 ± 7.89 years were recruited. Baseline logMAR was 1.18 ± 0.30 and a consistent decrease in logMAR was observed from week 1 to week 4. The success rate was 95.35% at week 4. The mean sphere significantly decreased from a mean pre-fitting value of ?4.58 ± 1.28 D to a mean value of ?0.65 ± 0.69 D at week 4 (p < 0.0001). Statistically significant corneal flattening was detected during keratometry at week 4.
Conclusion: Overnight OK with the White OK lens is effective for the correction of moderate and high myopia with astigmatism over a one-month wearing period.
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KEYWORD
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Myopia, Orthokeratology, Astigmatism
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