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Woo C. Park, Sae H. Rho, Sang W. Jin, Ki S. Park, Byung M. Min, Jong H. Lee; The Long-term Result of Corneal Correction of Presbyopia with Kera Laser. Invest. Ophthalmol. Vis. Sci. 2012;53(14):289.
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© ARVO (1962-2015); The Authors (2016-present)
To Analyze the long term results of corneal correction of presbyopia using Kera laser (Kera laser Inc, Spain)
The study included 137 eyes of 74 patients (F/U: mean 9.82 months) treated LASIK presbyopia correction using Kera laser. Patients were divided into three groups (myopic, emmetropic, and hyperopic presbyopia). Mean patient age was 52.07 years, mean preop. spherical equivalent was -4.73D (myopic), 0.13D (emmetropic), and 1.51D (hyperopic). The ablation pattern creates a multifocal corneal profile of central 3 mm optical zone for distance and next up to 9 mm for near correction. Main outcome measures were uncorrected visual acuity (UCVA) and best corrected visual acuity (BCVA) for near and distance, spherical equivalent refraction and contrast sensitivity at preoperative & postop. 1 week, 1 month, 3 months, 6 months, 12 months, 2 years and 3 years.
Three year postoperatively, mean UCVA was 0.93±0.17 for distance, 0.70±0.13 (nearly J2) for near at myopic group, and 0.88±0.26 for distance, 0.89±0.21 (nearly J1) for near at emmetropic group, and 0.93±0.27 for distance, 0.66±0.19 for near at hyperopic group. Mean postoperative spherical equivalent refraction was -0.74±0.93D at myopic group, -0.13±0.67D at emmetropic group, and 0.10±0.65D at hyperopic group. Three eyes lost more 1 line of BCVA for distance, and 14 eyes gained 1 line or more of distance BCVA. Contrast sensitivity decreased at postoperative 1 month but, recovered after postop. 3 month. Tear break up time and corneal sense was decreased at postoperation but, tear break up time was recovered after postop. 12month and corneal sense was not recovered at postoperative 3 years.
The Kera laser presbyopia surgery(Cnear) is a safe and efficient treatment that may improve functional near and far vision in myopic, emmetropic and hyperopic presbyopia.
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