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D.Y. Lin, E.E. Manche; Two-Year Results of Conductive Keratoplasty (CK) for the Correction of Low to Moderate Hyperopia . Invest. Ophthalmol. Vis. Sci. 2003;44(13):2683.
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Purpose: To evaluate the 2-year postoperative safety, efficacy, predictability, and stability results of CK for correcting low to moderate hyperopia. Methods: CK involves the application of radio-frequency current to the peripheral corneal stroma to correct hyperopia. In a prospective single-center study, 25 eyes from 14 participants with +0.75 to +2.75 D (Mean MRSE = +1.58 D) of hyperopia were treated with CK. Results:At 2 year postoperatively, uncorrected visual acuity was 20/20 or better in 64% of the eyes and 20/40 or better in 95%. The MRSE was within 0.50 D in 64%, within 1.00 D in 91%, and within 2.00 D in 100%. No eye lost ≥ 2 lines of best spectacle-corrected visual acuity at 2 year postoperatively nor had an induced cylinder ≥ 1.00 D. At 2 years postoperatively, the mean MRSE of the cohort was +0.48 D which reflected a 29% regression from plano and 43% regression from the initial postoperative over-correction. Most importantly, the rate of regression appears to be low and decreasing measuring +0.024 D per month between 12 and 24 postoperative months. Patient survey revealed improved quality of vision and high level of satisfaction. Conclusions: Conductive keratoplasty appears to be safe, and effective for correcting low to moderate hyperopia in this 2-year follow-up study. Mild regression was noted at the 2-year follow-up; however refractive stability as demonstrated by mean change in MRSE per month appears to be low and decreasing over time.
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