J Korean Ophthalmol Soc > Volume 54(2); 2013 > Article
Journal of the Korean Ophthalmological Society 2013;54(2):224-230.
DOI: https://doi.org/10.3341/jkos.2013.54.2.224    Published online February 28, 2013.
Analysis of Enhancement Rate According to Age after Refractive Surgery with Schwind Amaris.
Wook Kyum Kim, Hun Yang, Eun Young Cho, Hee Sun Kim, Jin Kuk Kim
1B&VIIT Eye Center, Seoul, Korea. bestjinkuk@bseye.com
2KAIST GSMSE, Daejeon, Korea.
아마리스 레이저를 이용한 굴절수술 후 연령에 따른 재교정 빈도 분석
김욱겸1,2⋅양 훈1⋅조은영1⋅김희선1⋅김진국1,2
B&VIIT Eye Center1, Seoul, Korea
KAIST GSMSE2, Daejeon, Korea
Abstract
PURPOSE
To evaluate the clinical effects of an automatic energy-lowering system in patients over the age of 28 years with Schwind Amaris laser platform by analyzing the enhancement operation rate according to age. METHODS: A total of 20448 eyes from 10224 patients who received a bilateral LASIK or LASEK operation with the Schwind Amaris laser platform between August 2007 and April 2011 in our clinic were included in the present study. The rate of enhance operation due to undercorrection was analyzed to determine whether the age affects the enhancement operation rate. RESULTS: There were a total of 17 enhancement operations. Fifteen out of 17 eyes who received the enhanced operation were above the age of 28 years (p=0.005). In multivariate analysis, patient age over 28 years (OR=6.75, CI 1.54-29.60, p=0.011), preoperative higher spherical equivalent (OR=0.56, CI 0.41-0.77, p=0.0004) and preoperative higher mean keratometric value (OR=1.38, CI 1.01-1.88, p=0.043) were significantly associated with a higher enhancement operation rate. CONCLUSIONS: Surgeons should be aware that the amount of laser energy from Schwind Amaris laser platform is automatically reduced in patients above the age of 28 years. Therefore, the nomogram should be adjusted to reduce the enhancement operation rate for a specific age group, especially in patients with higher preoperative myopic errors and steeper cornea.
Key Words: Enhancement operation;LASIK;Nomogram;Schwind Amaris laser;Undercorrection


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