Title: The long-term effectiveness of orthokeratology for myopia treatment
Abstract: Objective To assess the effectiveness of long-term orthokeratology(Orhto-K,OK) for myopia treatment in youth.Design Retrospective case series.Participants 30 young myopia patients.Methods During 2000 to 2005,30 patients(60 eyes) in the BeiYi Optometry Ophthalmology Center had been prescribed with the Ortho-K contact lens and wore it more than seven years.The refraction,visual acuity,corneal curvature,axial length,anterior chamber depth and lens thickness were examined pre-wearing and post-wearing OK lens at six months,one year,three years,five years and seven years.Main Outcome Measures Refraction(spherical and cylinelrical),uncorrected visual acuity(UCVA),corrected visual acuity(CVA),average K value,axial length,anterior chamber depth,lens thickness.Results At post-wearing OK lens six months,UCVA had been significantly improved from 4.26±0.28 to 4.71±0.36(P=0.00),and average K value of corneal curvature had been apparently flattened from 43.66±1.85 D to 42.41±1.66 D(P=0.00).Refraction had been significantly decreased from-4.76±2.20 D to-2.06±2.90 D(P=0.00).From six months to seven years,the UCVA,refraction and average K value maintained stable(4.70,-2.80 D,42.40 D).During the entire seven years,the axial length had slowly increased from 25.59±1.07 mm to 26.28±1.44 mm.Conclusions In generally,scientific and standardized long-term Orthokeratology wearing would be effective for controlling myopia and increase of axial length and improving naked vision.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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