Indeed, in some cases, LASIK or refractive surgeons may sometimes aim for slight over-correction. Often times, it may be done based on the surgeon’s understanding of his own surgical results. The aim is still to try to have the most accurate result possible.
Some surgeons may tend to under-correct or over-correct depending on certain levels of refractive error, patient-related factors or model of laser used.
This is one advantage of a laser platform that is used by a small group of surgeons or even a single surgeon whereby the results from past cases can help fine tune the surgical calculations according to the single surgeon and the specific laser machine.
Dr David Chan