Objective:To assess the changes in IOL-Master 700 parameters after administering sodium hyaluronate eye drops to moderate and severe dry eye and non-dry eye patients.Methods:Non-randomized controlled clinical research was performed.Patients with moderate and severe dry eye and non dry eye were enrolled in this study, with 40 patients in each group.All patients underwent IOL-Master 700 bioassay before and 5, 10 and 15 minutes after the administration of 0.1% sodium hyaluronate eye drops.The differences in axial length (AL), central corneal thickness (CCT), corneal curvature, and intraocular lens (IOL) were compared before and after the administration.All subjects signed informed consent.Results:In the dry eye group, the AL, CCT and IOL power were increased and the K1 were decreased at 5 and 10 minutes after administering sodium hyaluronate eye drops (P<0.05/3). IOL power of 17.5% increased by 0.5 D at 5 minutes after administering sodium hyaluronate eye drops.Further, 22.5% IOL power increased by 0.5 D or 1.0 D at 10 minutes after administering sodium hyalruonate eye drops.At 15 minutes after the administration, the IOL-Master parameters returned to the pre-intervention level.For the non-dry eye group, the AL and CCT were increased at 5 minutes after administering sodium hyalruonate eye drops, and the IOL power was decreased (P<0.01). The IOL power was decreased by a maximum of 0.5 D. At 10 and 15 minutes after administering sodium hyalruonate eye drops, the AL and CCT were significantly higher than those before the administration (all at P<0.05/3), but there was no significant change in IOL power (P>0.05).Conclusions:The IOL power of moderate and severe dry eye patients is increased at 5-10 minutes after administering sodium hyaluronate eye drops, and the IOL power of non-dry eye patients is decreased within 5 minutes after the administration.