We reviewed thoroughly literatures which included 239 online-available papers about SMILE, and, of them, we selected 116 original articles on clinical outcome or studies involving human lenticules after SMILE surgery and identified all the energy levels used in each article, as possible. Finally, we found almost all previous researches provided surgical results by using a 200 or 500 kHz VisuMax (Carl Zeiss Meditec AG, Jena, Germany) with energy levels of 115 to 190 nJ except only three studies: two studies by same researchers obscured the laser energy level (approximately 110 nJ) used in SMILE, however the other latest study provided definitely their laser energy 100 nJ (Figure 1 and supplemental table 1). There were 5 studies on SMILE using 115 nJ of laser energy in the literature.