The Result of Corneal Correction of Presbyopia with Kera Laser

1. Woo-Chan Park¹
2. Byung-Moo Min²
3. Ki-Sung Park¹
4. Jae-Kwan Park¹
5. Mun-Chong Hur¹

¹ 3-1, Dongdaeshin-Dong, Se-Ku, Dong-A Univ. Hospital, Dept. of Ophthal, Busan, KOREA
² 1034, Dunsan-dong, Se-ku, Daejeon, KOREA

Purpose: To Analyze the long term results of corneal correction of presbyopic using Kera Laser

Methods: The study included 105 eyes of 53 patients (F/U: mean 9.5 months) treated LASIK presbyopia correction using Kera laser. Patients were divided into three groups (myopic, emmetropic, and hyperopic presbyopia). Mean patient age was 52.10 years, mean preop. spherical equivalent was -4.7D (myopic), 0.1D (emmetropic), and 1.4D (hyperopic). The ablation pattern creates a multifocal corneal profile of central 3mm optical zone for distance and next up to 9mm 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 and 2 years.

Results: One year postoperatively, mean UCVA was 0.89±0.19 for distance, 0.65±0.14 (nearly J2) for near at myopic group, and 0.71±0.28 for distance, 0.78±0.22 (nearly J2) for near at emmetropic group, and 0.90±0.29 for distance, 0.62±0.21 for near at hyperopic group. Mean postoperative spherical equivalent refraction was -0.21±0.95D at myopic group, -0.09±0.69D at emmetropic group, and 0.13±0.67D at hyperopic group. Three eyes lost more 1 line of BCVA for distance, and 14 eyes gained more 1 line of distance BCVA. Contrast sensitivity decreased at postoperative 1 month but, recovered after postop. 3 month.

Conclusions: The Kera laser presbyopia surgery is a safe and efficient treatment that may improve functional near and far vision in myopic, emmetropic and hyperopic presbyopia.