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A. Oguri, M. Nishimura; Advanced Orthokeratology for Japanese Patients with High Myopia . Invest. Ophthalmol. Vis. Sci. 2003;44(13):3290.
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Purpose: To evaluate the visual results of Advanced Orthokeratology (Ortho-K) to treat Japanese patients with high myopia. Methods: The enrollment criteria of this study were: patient having myopia whose Ortho-K treatment was started after August 2001 at Jyoto eye clinic; spherical equivalent (SE) range from –6.0 to –9.0 diopters (D); a follow-up examination every 1 to 3 months for at least 1 year; no ocular disease except myopia. Eight eyes of 5 patients, with mean age of 28.2, were conducted. The mean SE was –7.22 D. The full custom rigid gas-permeable (RGP) contact lenses (CL) were designed for each eye. Uncorrected visual acuity (UCVA) was 0.06 or worse in all cases. The patients wore the RGP lens for approximately 9 hours per day in the waking and/or sleeping time. The follow up examinations were performed in the morning (10am to 12am). Results: The mean SEs were –3.92±1.21D at 1month, and –0.84 ±0.73D at 1 year. The average UCVA change is shown on Fig.3, and it was 0.81±0.46 at 1 year after the treatment. A UCVA of 1.0 (20/20) or better was obtained in 3/8 cases (37.5 %) at that time. No severe complications occurred during the follow up period. Conclusions: Although Advanced Ortho-K takes a longer time to receive a patient’s satisfaction in UCVA than refractive surgery, it was found to be safe and effective enough in the treatment of refractive errors for high myopia in this study. Longer follow-up is necessary for long-term results. This method deserves further investigation as one of the treatments of choice in refractive therapy.
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