Bausch & Lomb Biotrue Rewetting Drops Bausch & Lomb Biotrue Rewetting Drops instantly soothe & hydrate dry eyes caused by environmental factors such as extensive computer use, indoor controlled-air environments, lack of blinking, cigarette smoke & windy outdoor environments. They are also ideal for wetting & rewetting soft & hard contact lenses while you are wearing them for enhanced comfort all day long. Bausch & Lomb Biotrue Rewetting Drops contain hyaluronic acid (as sodium hyaluronate), the natural tear film found in healthy human eyes, to relieve dry eye symptoms including dryness, irritation, tired eyes & excessively tearing eyes. Bausch & Lomb Biotrue Rewetting Drops are a clear eye drop solution that is preservative free to increase tolerability yet can be used for 6 months once opened.