EFFECT OF TEAR OSMOLARITY ON POSTOPERATIVE REFRACTIVE ERROR AFTER CATARACT SURGERY
Published 2022 - 26th ESCRS Winter Meeting
Reference: P040 | Type: Abstracts | DOI: 10.82333/fpy0-gj16
Authors: Anete Kursite* 1 , Guna Laganovska 1
1Opthalmology,Pauls Stradins Clinical University Hospital,Riga,Latvia;Opthalmology,Riga Stradins University,Riga,Latvia
Purpose
To analyze effects of tear osmolarity on postoperative refractive error in patients undergoing cataract surgery.
Setting
One Clinical University Hospital
Methods
Prospective study. Patients were divided in two groups based on tear osmolarity (group Nr 1- normal tear osmolarity, <310 mosm/L; group Nr 2- hyperosmolar, >310 mosm/L). Exclusion criteria were met to avoid the effects of other factors that could significantly affect visual acuity and/or refraction (preoperative refractive error (>3 D), corneal pathologies, long or short axial length, uncontrolled and uncompensated ophthalmological co-morbidities). Preoperative and postoperative (1 month after surgery) visual acuity (VA), refraction and best corrected visual acuity (BCVA) was measured. Postoperative refractive error was measured as spherical equivalent (SE = sph + (0.5 × cyl)). Post operative VA, BCVA and SE were compared between groups.
Results
In the study were included 60 patients, who were scheduled for standard cataract surgery. 30 patients in group Nr 1 (control group, normal tear osmolarity) and 30 patients in group Nr 2 (hyperosmolar group). Targeted refraction for all patients after surgery was plano (0 D). Hyperosmolar group had statistically significant higher postoperative refractive error (p=0.01, Avarage SE Group 1= 0,345; Group 2= 0,608) and lower VA after surgery (p=0.02, Avarage VA Group 1= 0,896; Group 2= 0,832). But there was no statistically significant difference in BCVA after surgery between groups (p=0.16).
Conclusion
Increased tear osmolarity can significantly affect planned outcome of the cataract surgery as an unexpected refractive error. It would be useful to measure tear osmolarity before cataract surgery to achieve accurate results and improve patient satisfaction after surgery.