Abstract
We evaluated the axial length before and after LASIK (laser in situ keratomileusis) with a high precision optical coherence biometry, the IOLMaster™ (Carl Zeiss). The study involved 28 eyes of 14 patients (20∼55 years old) who underwent LASIK surgery from April to October, 2002. The range of spherical equivalent before surgery was -2.75∼-9.50 D (mean -6.33±1.77 D). The IOLMaster™ and ORBSCAN™ (Orbtek) were used to measure the axial length and the corneal thickness, respectively. All data were divided into three indexes: sex, age and refraction. These data were statistically analyzed by two way ANOVA. In all patients, the significant reduction (approximately 100μm) in both the axial length and the corneal thickness were shown regardless of age, sex and refraction (p<0.01). We concluded that the IOLMaster™ is very useful device to measure the axial length in keratorefractive surgery such as LASIK because of no need to contact with cornea.
