Comparison of axial and tangential topographic algorithms for contact lens fitting after LASIK.

摘要: PURPOSE Computerized videokeratography (CVK) has become the standard method for measuring corneal curvature after refractive surgery. However, few resources exist on use of CVK data postoperative contact lens fitting, and no recommendations selection best topographic algorithm relevant to gas-permeable (GP) fitting. This study assessed optimal fit spherical GP lenses patients who have undergone laser in situ keratomileusis. METHODS A retrospective analysis maps from eight post-LASIK eyes fitted with was performed Contact Lens Service Department Ophthalmology at Case Western Reserve University Hospitals Cleveland. Axial tangential Dicon CT 200 (version 3.50) or Humphrey Atlas A8) topographer were analyzed. Averaged dioptric curvatures different locations (inferior, superior, temporal) various distances (2.0 mm, 2.5 3.0 3.5 4.0 mm) vertex normal each eye compared base curves prescribed lenses. RESULTS One-way variance, Pearson correlation analysis, paired t tests showed that predictors a successful curve average mm distance axial (r=0.8078, P=0.05) 2.0 (r=0.9738, P=0.0002). The mean powers curve, map curvature, 41.50 diopters (D), 42.65 D, 42.67 respectively. CONCLUSION To simplify guide fitting LASIK, are accurate selection.