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D. Oh, Y. Chun, J. Kim; Efficacy of Presbyopic Corneal Ablation With Central-Saving technique : 12-Months Follow-Up. Invest. Ophthalmol. Vis. Sci. 2010;51(13):3938.
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To evaluate the efficacy, wound healing rate, and refractive changes after the excimer laser with Central-saving technique(CST) for presbyopic correction.
This study was designed as prospective, comparative study. Ten eyes of 6 patients with emmetropia (mean spherical equivalent: 0.78±0.25D) had aspheric corneal ablation with preserving central cornea (3.6 ~ 4.0 mm diameter, CST group). Thirteen eyes of 7 patients with emmetropia were underwent the conventional presbyopic eximer laser (non central-saving technique: NCST group). Wound healing rate, uncorrected and best-corrected visual acuity, manifested refraction, and corneal topography were compared before the surgery and at 1, 3, 6 and 12 months after the surgery.
Wound healing time were 1.2±0.3days in CST group, whereas 4.5±2.1days in NCST group. The achieved time of effective near and distance visual acuity (logMAR 0.3 and 0.1) was each 1.2±0.4days and 2.3±1.5days in CST group, whereas each 2.3±1.2days and 5.2±2.1days in NCST group. At postoperative 12months, near and distance uncorrected visual acuity was each logMAR0.009±0.12 and logMAR0.14±0.16 in CST group. Corneal topography showed better maitained central steepness and prolaticity in CST group than NCST group.
Corneal ablation with CST for presbyopic correction can be effectively used for emmetropia patient by faster wound healing, visual recovery and long-lasting effective maintenance of refractive far and near visual acuity.
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