Forest plot showing the odds ratio (OR) of proportion of eyes that lost of one or more lines of best spectacle corrected visual acuity (BSCVA) comparing small incision lenticule extraction (SMILE) with femtosecond laser-assisted LASIK (FS-LASIK) within six months postoperatively.

<p>The diamonds represent the summary estimates of all five studies or the subgroup analysis of two RCTs and three cohorts.