Ocular surface dysfunction and tear osmolarity after cataract surgery

Abstract

AbstractPurpose The aim of the study was to evaluate subjective symptoms, tear film break up time (BUT) and tear osmolarity before the cataract surgery and in the early postoperative period.Methods 32 patients undergoing cataract surgery were included into the study. They were submited to clinical evaluations including the administration of Ocular Surface Disease Index (OSDI) questionaire, visual acuity, slit lamp examination, estimation of BUT. Tear samples were collected for osmolarity evaluation. All the tests were performed day before surgery, one week and one month after surgery.Results Before the surgery 11 (47,8%) patients had no or mild dry eye disease, 21 (52,2%) – moderate and severe. The mean BUT was 7,4±3,2s and decreased in one week and one month after surgery (5,13±2,54s); paired differences were significant. Tear osmolarity was 306,25±15,38 mOsm/l with tendency to increase in one week (307,32±17,13) and decreased one month after surgery (293,7±24,05); paired differences were significant. OSDI score had tendency to increase one week and month after the surgery.Conclusion Patients complaints increased in early postoperative period. Tear film stability significantly decreased one week and one month after surgery with the significant decrease of tear osmolarity. Decreased tear film stability could influence ocular discomfort after cataract surgery.