Abstract
Purpose: :
To evaluate the efficacy, wound healing rate, and refractive changes after the excimer laser with Central-saving technique(CST) for presbyopic correction.
Methods: :
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.
Results: :
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.
Conclusions: :
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.
Keywords: presbyopia • refractive surgery • refractive surgery: comparative studies