Effect of tear osmolarity on postoperative refractive error after cataract surgery


  • Anete Kursite Riga Stradins University, P Stradins Clinical University Hospital
  • Guna Laganovska Riga Stradins University, P Stradins Clinical University Hospital




tear osmolarity, dry eye disease, cataract surgery, refractive error


Purpose: To analyze the effects of tear osmolarity on postoperative refractive error and patient satisfaction after cataract surgery.

Methods: The patients were divided into two groups based on the tear osmolarity (group Nr 1-normal tear osmolarity, <310 mOsm/L; group Nr 2-hyperosmolar, >310 mOsm/L). Preoperative and postoperative (1 month after surgery) visual acuities (VAs), refractions, and best corrected VAs (BCVAs) were measured. The postoperative refractive error was measured as the spherical equivalent (SE) (SE = sphere + [0.5 × cylinder]). The postoperative VA, BCVA, and SE were compared between groups.

Results: Eighty-one patients were included in the study (group Nr 1=40 patients and group Nr 2=41 patients). The hyperosmolar group had a statistically significant higher postoperative refractive error (p<0.01, mean SE for group Nr 1=0.284; mean SE for group Nr 2=0.604) and lower VA after surgery (p<0.01, mean VA for group Nr 1=0.891; mean VA for group Nr 2=0.762).

Conclusions: Increased tear osmolarity can affect the planned outcome of cataract surgery as an unexpected refractive error. Measuring tear osmolarity before routine cataract surgery would help achieve accurate results and improve postoperative patient satisfaction.

Author Biographies

Anete Kursite, Riga Stradins University, P Stradins Clinical University Hospital


Guna Laganovska , Riga Stradins University, P Stradins Clinical University Hospital



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How to Cite

Kursite A, Laganovska G. Effect of tear osmolarity on postoperative refractive error after cataract surgery. J.ophthalmol. (Ukraine) [Internet]. 2023 Apr. 25 [cited 2024 Apr. 22];(2):11-5. Available from: https://ua.ozhurnal.com/index.php/files/article/view/20



Clinical Ophthalmology