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Overnight orthokeratology experience with XO material
P Sarita Soni1, Tracy T Nguyen,
1Borish Center for Opthalmic Research, School of Optometry, Indiana University, Bloomington, IN 47405, USA. sonip@indiana.edu
Eye & Contact Lens
|January 18, 2006
Summary
Overnight orthokeratology using Boston XO lenses effectively corrects myopia long-term. Proper patient education and regular eye exams are crucial for safe and successful use of these myopia control lenses.
Area of Science:
- Ophthalmology
- Optometry
- Corneal Refractive Therapy
Background:
- Myopia prevalence is increasing globally, necessitating effective refractive error correction methods.
- Orthokeratology offers a non-surgical approach to myopia management through overnight lens wear.
- Advancements in lens materials like Boston XO enhance gas permeability and patient comfort.
Purpose of the Study:
- To assess the long-term safety and efficacy of overnight orthokeratology.
- To evaluate three distinct lens designs utilizing the Boston XO material.
- To analyze outcomes in a large cohort of myopic subjects, including juveniles.
Main Methods:
- A multi-center study involving 342 myopic subjects (99 juveniles) across the US and Canada.
- Subjects had myopia ≤4.00 D and astigmatism ≤1.50 D, with baseline visual acuity of 20/40 or better.
- Effectiveness measured by refractive error and unaided visual acuity at 1 and 12 months; safety assessed via symptoms and slit-lamp findings.
Main Results:
- Over 60% achieved 20/20 or better vision by 1 month, with sustained results at 12 months.
- Myopia reduction averaged 70% at 1 month and over 90% at 12 months.
- Safety profile improved over time, with decreased symptoms and fewer adverse slit-lamp findings.
Conclusions:
- Overnight orthokeratology with Boston XO lenses is an effective myopia correction method.
- Safe application depends on comprehensive patient education regarding lens care and wear.
- Regular follow-up examinations by eye care practitioners are essential for ongoing safety and efficacy.
