“…For the patients with OSAHS, six studies (Acar et al, 2013;Karaca et al, 2019;Muhafiz et al, 2020;Lin et al, 2022;Liu et al, 2022;Ulutas et al, 2022) examined the incidence of FES and four studies examined the incidence of dry eye (Acar et al, 2018;Liu et al, 2022;Pu et al, 2022;Gunes et al, 2023) (Table 1). Sixteen articles (Kadyan et al, 2010;Acar et al, 2013;Karaca et al, 2016;Fox et al, 2017;Liu and Gao, 2017;Acar et al, 2018;Karaca et al, 2019;Cristescu and Mihaltan, 2020;Muhafiz et al, 2020;Bi et al, 2022;Bonacci et al, 2022;Lin et al, 2022;Mavigok et al, 2022;Pu et al, 2022;Ulutas et al, 2022;Gunes et al, 2023) compared the ocular surface assessment outcomes of the patients with OSAHS and healthy controls. Seven publications (Karaca et al, 2016;Cristescu and Mihaltan, 2020;Muhafiz et al, 2020;Lin et al, 2022;Liu et al, 2022;Pu et al, 2022;Gunes et al, 2023) reported a COR between Schirmer 1 and AHI scores (either Spearman's or Pearson's).…”