“…One study (Imanaka et al, 1997) included both a retrospective and prospective cohort study design, we extracted data from both study designs, so there were 24 sets of data. The frequency of cornel examination in 12 studies (Araujo et al, 2016;Germano et al, 2009;Hartford et al, 2019;Imanaka et al, 1997;Jammal et al, 2012;Kousha et al, 2018;Kuruvilla et al, 2015;Li, 2015;Li, Jin, et al, 2022;Oliveira et al, 2022;Silva et al, 2021;Werli-Alvarenga et al, 2011) is greater than or equal to five times and in the other 10 studies (Casillas-Chavarin et al, 2016;Gok et al, 2021;Hernandez & Mannis, 1997;Li et al, 2008;Martínez-García et al, 2020;Masoudi et al, 2013;Mercieca et al, 1999;Narmawala & Jani, 2017;Oliveira et al, 2022;Siebert et al, 2017) is less than five times during the studies period. Furthermore, the follow-up time in 12 studies (Araujo et al, 2016;Germano et al, 2009;Hartford et al, 2019;Imanaka et al, 1997;Kousha et al, 2018;Kuruvilla et al, 2015;Li, 2015;Li, Jin, et al, 2022;Mercieca et al, 1999;Oliveira et al, 2022;Silva et al, 2021;Werli-Alvarenga et al, 2011) is beyond 7 days and in another three studies (Jammal et al, 2012;…”