Tranos PG, Allan B, Balidis M, et al. - In this retrospective, comparative, interventional case series, researchers tested the efficiency of preoperative biometry in eyes undergoing combined phacovitrectomy and contrasted it with eyes having cataract surgery at a later point in time following vitrectomy. Participants in the study were individuals with epiretinal membrane or macular hole who had combined phacovitrectomy (group 1) or phacoemulsification following pars plana vitrectomy (PPV) (group 2). Group 1 and 2, respectively, consisted of 55 and 54 eyes for a total of 109 eyes involved in the study. For group 1 and group 2, the mean absolute PE was 0.59 D (range + 1.4 to − 2.5D) and 0.35 (range + 1.0 to − 1.45D). Compared with phacoemulsification alone after vitrectomy, combined phacovitrectomy can result in greater postoperative refractive prediction error. Individuals with poorer vision, greater central macular thickness, and shallow anterior chambers need more attention because they are prone to inaccurate preoperative biometry.