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I. Mitsui, Y. Yamada, Y. Yagi; OSEIRT/Ortho–K Indication for the Hyperopia Patients . Invest. Ophthalmol. Vis. Sci. 2005;46(13):2063.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: Ortho–K is usually known as non–invasive technique to reduce myopia and astigmatism. Traditionally, it was not indicated before for the hyperopia patients because of the difficulties of lens design. However, two years ago we started Ortho–K like procedure to reduce hyperopia, with the newly developed lens design called OSEIRT(Ocular Surface and External Integrated Remodeling Therapy). We report the results from twenty–one cases of hyperopia. Methods: OSEIRT was indicated for thirty–eight eyes of twenty–one hyperopia patients; age form six to fifty–eight. The average of their Uncorrective Visual Acuity (UCVA) before OSEIRT was 20/30 or worse, and mean Spherical equivalent (SE) was +2.43D (range +0.75 to +4.25D). They were followed at least one years wearing of OSEIRT lenses during night. The following studies were examined on their auto–refraction, auto–keratometry, uncorrected and corrected visual acuity, intra–ocular pressure, corneal thickness and curvature, corneal shape (topography), and corneal endothelium. Results: The mean SE improved to +2.04±1.33D during six months, +1.86±0.92D during nine months, and +1.02±0.72D during one year. Astigmatism also slightly decreased. 68% of the patients improved in UCVA up to 20/30 or better, 46% of them improved up to 20/20 or better, and 28% of them improved up to 20/15. Intra–ocular pressure and endothelium remained normal. Topographically, cornea changed its shape to convexity. Ophthalmologic examinations showed no abnormalities throughout the therapeutic period. Conclusions: OSEIRT/Ortho–K was so effective to reduce hyperopia and evaluated to be safe enough for the patients of all age. However, in order to get the effective results, the lens design of OSEIRT for hyperopia was needed to be completely customized.
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