Induction of higher-order aberrations as a result of myopic femto-LASIK
The results of the higher-order aberrations induced during femto-LASIK myopic correction measurements are presented in this article. Higher- order aberrations (HOA) were measured by automatic wavefront analyzer (aberrometer) in 166 eyes of 83 patients with low, moderate and high myopia before and after (not less than 6 month) the operation. Statistically significant (р<0,001) increase of HOA occurred as a result of the operation, mostly due to the increment of spherical and «coma» aberrations, change of «trefoil» aberration was not statistically significant (р=0,362). The analysis of the correlation between HOA induction and preoperative spherical refraction value described it as moderate, meaning that only the part of HOA variability was determined by the ablated tissue volume. But it is still evident that higher level of preoperative myopic refraction corresponds to higher value of intraoperative HOA induction.