Objective: To identify microscopic morphological alterations in the surface of silicone tubes used for intubation of the lachrymal system after exposure to ophthalmological lubricants. Methods: Experimental, descriptive and longitudinal study consisted of the application of ophthalmological lubricants in silicone tubes. The tubes were divided in: Group 1 (Cylocort®), 2 (Epitezan®), 3 (Labcaína®), 4 (Liposic®), 5 (Maxinom®) and 6 (Vista Gel®). One tube was not exposed to any lubricant, used as control. The tubes were observed and photographed after 2 hours, […]