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First Author: R.Ueki JAPAN
Co Author(s): N. Maeda M. Fuchihata S. Koh T. Kitaoka K. Nishida
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To investigate the corneal biomechanics in eyes with keratectasia following LASIK using a dynamic Scheimpflug analyzer (Corvis®ST, OCULUS).
Osaka University Graduate School of Medicine, Japan
The subjects included in the study were 12 eyes with keratectasia following LASIK, 20 eyes with keratoconus, 19 eyes without complication following LASIK, and 15 eyes of normal corneas. The subjects with keratoconus and LASIK were matched to those with keratectasia in terms of intraocular pressure and central corneal thickness. 11 parameters obtained with the dynamic Scheimpflug analyzer were compared among four groups.
The coefficient of correlation between IOP with Dynamic Scheimpflug analyzer and non-contact tonometer was 0.42 (p<0.001). There were significant differences in Velocity at outward, Radius, and Deformation Amplitude among four groups (one-way ANOVA, p<0.001). There were significant differences in Velocity at outward, Radius, and Deformation Amplitude between keratectasia and LASIK (p<0.05, Tukey), although there were no differences in these values between keratectasia and keratoconus.
Corneal biomechanical features obtained with the dynamic Scheimpflug analyzer suggested that biomechanical properties in eyes with keratectasia, keratoconus, and LASIK were different from those in normal eyes, and those in keratectasia were similar not to those in LASIK but to those in keratoconus.
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