Medical Lasers

Korean Society for Laser Medicine and Surgery (대한의학레이저학회)
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Effectiveness of Overnight Orthokeratology with a New Contact Lens Design in Moderate to High Myopia with Astigmatism

  • Park, Yuli (Department of Ophthalmology, Dankook University Hospital, College of Medicine, Dankook University) ;
  • Kim, Hoon (Department of Ophthalmology, Dankook University Hospital, College of Medicine, Dankook University) ;
  • Kang, Jae Ku (Department of Computer Engineering, Dankook University) ;
  • Cho, Kyong Jin (Department of Ophthalmology, Dankook University Hospital, College of Medicine, Dankook University)
  • Received : 2021.11.30
  • Accepted : 2021.12.22
  • Published : 2021.12.31
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Abstract

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.

Keywords

Acknowledgement

This study was supported by Interojo who supplied of lenses for free. The funding organization has no role in the design of this research.

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