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Title	Never underestimate the power of the tearfilm
Abstract Nr.	3003

Purpose	The optical function of the eye directly depends on the quality of the tear film. This study is trying to prove whether patient satisfaction after trifocal IOL implantation is related to abnormalities of the preoperative tear film
Methods	Before surgery all patients were asked to fill out a OSDI questionnaire. Also the tear film osmolarity together with interleukin and MMP-9 were measured. One group of 15 patients received a preoperative treatment to normalise the tear film parameters (possible treatments were artificial tears, anti-inflammatory drops, punctal plugs, omega-3 supplements, lipiflow and/or IPL treatment) and the control group did not get a preoperative regimen. One month after surgery all tests were repeated and compared with the preoperative data.
Results	In the 15 patients with preoperative treatment to improve the tear film the quality of vision and patient satisfaction were found to produce statistically significant improvement (p〈 0.001) while no significant changes were seen in the untreated control group.
Conclusion	Abnormalities of the tear film such as those occurring in the dry eye syndrome or in otherwise irritated eyes may interfere with vision. Measuring, precisely identifying and treating tear film abnormalities before any kind of surgery will greatly improve accuracy of the treatment and will boost patient satisfaction.
Conflict of interest	No

Authors 1