Astigmatism Analysis and Corneal Surgery

摘要

According to the present invention, the astigmatism analysis method which can provide data to enable the doctor to identify the post-operational requirements and achieve a useful comparison between a number of operations and techniques in order to achieve the initial surgical goal before surgery It is described. The method includes determining a preoperative astigmatism 1, defining a target astigmatism 2, and determining a resultant astigmatism 3 after the initial operation. The astigmatism value is initially determined within the range of 0 ° to 180 ° and is doubled to change to the 360 ° range. The target induced astigmatism vector (AIA), the surgical induced astigmatism vector (SIA), and the vector difference are calculated and the angle values are bisected to return to values in the range of 0 ° to 180 °. The size and angle of the vectors are calculated to enhance astigmatism and provide astigmatism size values and angle values for altering the parameters of subsequent surgery for mathematical analysis. The method also provides a principle for setting treatment parameters when the glasses and corneal astigmatism do not match.