Moderate to severe dry eye therapy. No. 1 doctor recommended brand (survey of ophthalmologists and optometrists, Harris Interactive, December 2008). Sterile. Enjoy lasting, all-day comfort with Systane Liquid Gel Lubricant Eye Drops. Systane Liquid Gel Lubricant Eye Drops provides soothing gel protection. Every drop delivers the lubrication of a gel so eyes feel fresh and moist day or night. Acts like a drop. Protects like a gel.