Correlations between central and peripheral changes in anterior corneal topography after myopic LASIK and their implications in postsurgical contact lens fitting.

摘要: PURPOSE To investigate the changes in central and peripheral anterior corneal curvatures after myopic laser situ keratomileusis (LASIK) to correlate them with manifest refractive change discuss how such results could affect post-LASIK topography profiles midterm stability their implications postsurgical contact lens fitting. METHODS Topographic data from 18 eyes of 11 patients that had undergone LASIK were collected for 6 months surgery. Short-term topographic responses investigated correlated spherical equivalent changes. RESULTS There was a strong correlation between eccentricity 15 days surgery (r = 0.753, P < 0.001), no significant thereafter following 0.148, 0.114). A linear relationship found baseline refraction curvature at center 0.810, 4-mm chord 0.895, 6-mm 0.696, 0.001). Statistically also first (P 0.005) showed regression effect affects three zones. In this case, weaker final location 0.412, 0.004), area 0.430, 0.003), 0.283, 0.023). CONCLUSIONS.: After LASIK, dioptric power is expected change, on average, approximately 77% attempted correction center; 60% region, where stronger found; 30% area. The paracentral 4 mm seems be more likely predict change. Some degree period occur which shows Again, evident accurately predicted current study are interest those fitting lenses LASIK.